Not as good as Grand Prix
I just watched these back to back and my conclusion is Le Mans is not quite as good as Grand Prix.
First off, McQueen was not in the same league as an actor as Garner was and it shows. Second, there literally is no actors of major stature supporting Le Mans. In Grand Prix you had a pantheon of actors who are truly legendary.
Le Mans may be a bit more technically accurate but what of it? Grand Prix utterly nailed the zeitgeist of mid 1960s F1 racing. That's far more important.
You have Aron as second fiddle to Stoddard on the British team when clearly he was the better driver. It's obvious his car wasn't being given the level of care that Stodddard's was given and it ironically cost them both cars and nearly Stoddard's life for it.
You have the thinly veiled stand-in for Enzo Ferrari, Agostini Manetta, disparaging and haranguing Sarti. Then calling in all his drivers, denying Nino Barlini the win he had earned on the track. after he got Sarti to kill himself on th. It totally captured the capriciousness and venality of both the man, Ferrari and his team. I have to wonder why anyone would want to drive for Ferrari period, no matter how good their cars were. You clearly got support or loyalty from management. Perfect casting using a Bond villain to portray him.
You have Sarti himself. Admitting to Aron about being tired of driving. The man was clearly losing his focus and in F1 where you're manhandling missiles around a track with no margin for error, a loss of focus can kill you.
ToshirĂ´ Mifune as Izo Yamura, with Yamura Motors standing in for Honda. Driven, methodical and exacting, applying science to the art of auto racing and hungry to prove his company and country was as capable as the Europeans in the king of motorsports.
Peter Aron as the American competing in what is essentially the Europeans only club of motorsports and hungry to show them he's damn better at it than they are. Most of the teams he drives for are holding him back, keeping him as second fiddle in a second rate car and effort. When he hooks up with Yamura, it's a prefect match, two outsiders determined to beat the Europeans at their game.
Second level players who have clawed their way into the rarefied atmosphere like Nino Barlini, portrayed by Antonio Sabato. He adroitly handled the stereotype of the dirt poor Sicilian kid, capable of being a winner but used and clearly viewed as irrelevant and disposable by the likes of Ferrari and company.