Very little difference at highway speeds between M3LR and M3P. I did those test drives a few days apart and couldn't really tell the difference at all on the highway. Either felt comparable to my P85, which is good enough for me, but if you're after big highway pull look at the new yoke Model S. Even the MSLR will easily outpull M3P on the highway from what I've read. (I haven't driven a yoke car yet.)I test drove only the M3LR and MYLR. Can't find a performance to test. I'm sure the performance will feel better than the LR. I am very curious to feel how it pulls at speed. My test drive vehicles were speed limited to 85mph. I am very curious to feel the performance 60 - 100.
MS is a very different kind of car of course. Great cruiser, but too big to really feel at home in the twisties IMO, even if it actually turns pretty well for what it is. And dat yoke...a yoke *could* be sporty, but the more I've read about how Tesla implemented it, the more it sounds like a cruiser bruiser. The steering ratio isn't fast like 3/Y, and the yoke itself is actually huge, not small & sporty. Again great for cruising, not great for twisty back roads. Or city maneuvering. (Disclaimer: Talking out of my butt here, haven't driven a yoke MS yet as mentioned. But I'm fairly confident these impressions will hold up once I do.)
Btw at low speeds the M3P vs M3LR difference was very apparent even several days apart, e.g. punching it after turning onto a straight onramp. I assume the same is true of MYP vs MYLR.