Basically yea. The Performance is tuned kind of like how Subaru tuned the early STI cars, ie. in Japan where it their road surface is insanely flat. They literally just took the dampers from the JDM cars and slapped them into the USDM car. I'm kind of surprised your later car handles the same way. The Performance is tuned with higher amounts of low speed compression, ie it feels stiffer with reduced roll but requires a bigger impact to actually compress the damper ie. overcome the bump compression. That higher impact force jars my insides. I can't use a regular mug in the wife's Performance, it would spill all over the place, even holding it in hand vs cup holder. The impact forces transferred to the cabin in the Performance is on the level of lowered car on crappy coilovers like google the JIC FLT A1 on the early Subarus. It's kidney pounding but in the Performance its wrapped in a much better isolated chassis that rides on a silly amount of elastomer damping, ie. the top hat rubber and bump stops so your brain gets tricked into thinking it feels much better than it is. As you can read I don't mince words when it comes to Tesla's simplistic damper tuning. However the chassis can be easily improved with a good set of coilovers that have low speed bump adjustment and there are a few good choices in that dept. With a good set of adjustable dampers you can get it much more comfortable for a sports car but it will never be a Benz though just keep that in mind.
That said, just like with the WRX you can't build a STI from the WRX for the difference in cost between them. In the case of the Tesla you can't do that at all due to the changes in the motors and whatever else undocumented changes.
