Formula One ( F1 )

Far from it! Big fan of both drivers but can't help that that film marked a huge step in turning Prost into a pantomime-esque villian. There are plenty of relatively unbiased documentries on the Senna-Prost battles. One that's catering to popcorn munchers probably isn't the best source of information. I've yet to watch Rush but I feel it will be much of the same.

Have you read Mansell's autobiography? It makes the portrayal in Senna quite credible. He absolutely hated Prost, accusing him of all sorts of underhand political moves to try and win before the car was even on the track; doing deals with Honda to get a more powerful engine than Mansell, for example.
The fact that only Prost is leaping to Prost's defence is also telling.

I think the friends off-track, rivals on it relationship between Hunt and Lauda is so well known that whatever Rush portrays, the truth will be the version of events that sticks.