Here's Liuzzi's take:
Daniel is a fast driver and it makes sense for Red Bull after they’ve spent so much money in the development programme to choose him. It’s the more obvious decision.
Comparing him with Vettel, I think he can be competitive. Where Vettel was when he was my team-mate in 2007 is where Daniel was as well when he was my team-mate in 2011. Now, Sebastian is three-time world champion. I don’t think there is another obvious choice.
At HRT in 2011, Daniel was all right. But, and it was the same for Vettel, when he did the first race he’d already driven so many kilometres.
Daniel struggled a bit at Silverstone [in 2011], then had a few good races, and then struggled again. But overall, he was pretty similar to when Vettel started with me at Toro Rosso.
The Red Bull is still the best car in F1, so I’m sure Daniel can show a good performance.