I found some interesting thing
http://img243.imageshack.us/my.php?image=compare2yr.jpg
1. On the shift to 7th gear, JA's motor seems to pull a bit cleaner. Either he is getting a bit of a draft, or he's just got a little bit better 'plant.
2. Both guys really spike the brake pressure hard at the beginning of the brake zone which is what you have to do to minimize the braking distance on a heavily aerodynamic car. LB has a very controlled brake pressure trace where as JA's brake pressure is a bit 'noisy'. He seems to be releasing brake pressure during downshifts. This is fairly common for a right foot braker in a 'normal' car, but with a semi-auto gearbox and computer controlled blipping, it seems a little strange. Does anyone know the particulars on JA's braking? I don't know a hell of a lot about that car, but it looks like to me, that the blips might be the driver's doing (as God intended!). Also, both guys hit the brakes at the same time, but LB let's off the gas just a bit later...he seems to be overlapping his throttle & brakes a little. It's hard to tell by the trace, but if so, that's a no-no as it puts a lot of extra heat in the brakes.
3. The throttle trace is definitely bizarre. It must be some sort of computer controlled throttle release in an effort to reduce rear tire lockup under braking. Both cars have the same rate of release from about 10% throttle on down. It doesn't look like any driver controlled thing I've ever seen. Incidently, if the throttle is open a good chunk through all of these low speed corners, that could very well be a big contributor to the understeer in the car.
4. JA short-shifts to 3rd gear where LB dabs at the brake with his left foot to get through Turn 2. They both lift the throttle. I'll take JA's approach since it's a little easier on the car. There's no real speed difference.
5. JA goes much deeper into T3. He carries something like an extra 15kph on the entry. That's a big deal. LB is off the gas earlier and is again dabbing at the brake to settle the car. I'd like to see the steering trace here. My guess is that JA is real busy. LB gets back to throttle early and probably picks up a good portion of the time he lost on entry down the next straight. We need to have a 'time compare' channel to really know for sure.
6. LB is later to the brakes for T4. He seems to really stove it into the corner. JA is much better at getting off the brake and rolling speed into the corner. Getting off the brake pedal early is a very tough thing to do. They get to throttle at about the same point on the track, but since JA is at a higher speed, he carries that advantage all the way down the next straight. You would kind of expect the traces to come together as the speed goes up, but I think JA has a little bit of an engine advantage, and the staight isn't that long. This corner is a good gain for JA.
7. Braking for T5 is basically identical. Again, JA's trace shows signs of coming off and getting back on the pedal, as if he were blipping the throttle. Could that be it? I don't know. I don't think he's modulating the brake pedal to reduce locking. Not at 250kph, at that speed, you just hit the pedal for all you've got and have a lot of faith in aerodynamics. Any modulation to reduce locking is going to be at the end of the brake zone. They run this corner fairly different. LB goes to first gear where as JA only goes to 2nd. They carry the same corner minimum speed, but LB goes to throttle first. Even though LB goes to throttle first, JA is the guy who accelerates away from the corner a little cleaner. I'm guessing wheelspin/traction control is a problem for LB in the lower gear where at JA is able to put power to the ground a little better in the higher gear. Again, JA gets a bit higher top speed for no apparent reason.
8. Braking for T6 is very similar. In this corner JA isn't 'pumping' the brakes. It makes me wonder even more what's going on there. They both get off the brakes at the same time, but JA is able to get back to throttle just a bit earlier, which gives him the advantage down the next straight. His car seems to have just a touch more rear grip, especially in a power-down situation.
9. T7 is a big difference between the two. JA slows the car just a touch more on entry. He has a bigger brake pressure spike, but is off the brakes much sooner. He gets to throttle a lot ealier and has a big advantage down the next straight.
10. T8 is very close between the 2 drivers. They both brake well into the corner, but I'd say the advantage has to go to Burti. The bigger brake spike early in the brake zone let's him be a little more efficient and go a touch deeper. JA is again playing around too much with the pedal. JA initiates throttle a little ealier at exit, but LB actually gets to 100% first. There's no real clear advantage for either guy in this corner.
11. They brake similarly into T9, but JA looks like he overcharged the brake zone and had to over slow the entry. My guess is that the rear started to break free on him in this corner at about the time he shifted into 2nd gear (maybe it was the downshift locking the rear tires a touch). Regardless, JA seems to be able to gather it up and get down the next straight at least as good as LB.
12. JA again shows that he's brave in high speed corners, but his bravery seems for naught. He goes to 5th gear at the entry of the corner and then gets completely off the throttle and slows to a much lower minimum than LB. Also, since his minimum is later than LB, he gets a bad shot onto the next straight. LB comes off the throttle earlier and less, and also brakes with his left foot. He seems to keep the car more settled and is able to carry more speed across the apex and get to earlier throttle. He holds his advantage down the next short straight.
13. In the last corner, T13, JA goes the brakes a little later, but pays for it by having to overslow the apex a little. LB backs up the entry just a little, uses less brake and more gas. He carries more mid-speed and has about the same corner exit shot. Slight advantage to LB.
All in all, I'd say that JA has a little better low speed corner technique and LB is a little better at the more flowing corners. It's really hard to compare the 2 when you don't know the differences in the cars (which could be pretty massive). Both guys seem to be fighting the car. It would be easier to make that call if we had a steering trace to look at as well, but just judging from the shape of the speed trace it looks like they are having to overslow the corner entries. JA shows he's pretty fast in most the corners, but LB shows the way a little here and there as well. LB has a better throttle application trace in general....it's smoother. I don't know what's up with JA's brake pressure pumping. He needs to get rid of that. He tends to play around with the throttle pedal in a similar manner. That's just not the fast way around the track.
Both guys look like they really have their hands full. I don't remember JA having a lot good to say about the Prost. I do remember his comments on the aerodynamics of the car. They weren't too flattering. I'm sure everyone was trying the best they knew how, but judging from what we've seen here I'm going to go back to what I said about getting some mechanical rear grip in the car.
Amazing stuff. Will keep me entertained for hours! 
. Won't get any coursework done today. 
