While I can't answer your question with direct experience or data, with the TM3 specifically, there is a point around 60 mph where the field weakening occurs and torque (greatly) and hp (to a less extent) start dropping. The TM3P and MSP do have different part numbers so of course they will be slightly different. However, I would expect a similar drop off in power and torque once that field weakening point is reached.
This dyno graph gives an indication on the crazy amount of torque drop off at field weakening.
Tesla Model 3 LR RWD Dyno Testing At Various SOC
I've said this in a previous post, but we will have multiple speed transmissions eventually in performance cars (the original Roadster had it, but the torque destroyed it in short order so it was scrapped. The new Taycan does indeed have a 2 speed transmission for exactly this). Honestly (and I can't believe I'm uttering these words as I absolutely DESPISE them) CVT's transmissions and EVs would be a match made in heaven, but there is just no way at this point CVTs can handle the torque.
The "push you back in your seat" at any speed sensation is mostly due to torque. Tesla is using field weakening to extend the operating speed of the motor today. Current motors cannot maintain max torque and power at the large speed ranges necessary for single speed operation so they introduce field weakening. Sure, wind resistance and other factors mute the torque sensation at high speeds in all cars, but that's why high torque ICE cars have a better sensation and even better acceleration given the same max torque rating at high vehicle speeds (ICE would have their max torque available as long as they are in their rev range which they can control with transmissions whereas single speed EVs will have reduced torque for all speeds above the field weakening point).