It will be interesting to see how the two of them develop their approaches to each other. In this case, the onus was on Verstappen to change (which he did) as Leclerc had the upper hand after the first attempt. Leclerc will now change in response and on and on. Watching drivers develop their techniques respective to other drivers is pretty interesting to me. When Leclerc interlocked wheels on the exit during the first attempt, I wondered if he did it deliberately to stop Verstappen using his better traction (all four wheels on track vs two) from accelerating away. Second time around, Verstappen kept it wheel-to-wheel and did the trademark Verstappen 'nudge', wheel-face-to-wheel face (you can see him doing it to Ocon to make a point at the final race of the season last year) both making sure Leclerc lack traction and preventing any interlocking of the wheels.
Kimi is particularly interesting as he really divides the field. Older drivers know that he is cool under pressure and a consummate professional so they can try overtakes with him that would be too risky on others because they know he'll react professionally and has the skill to handle the situation. Younger drivers see someone 'weak' who they can 'bully' their way past at the obvious overtaking parts but don't realise they can try more complex moves because they don't rate him.
Almost all the drivers have different approaches to each other and it's one of the few ways to see who actually has respect for who.