Well, I have to admit you provided a lot of laughs with this one. I'm sorry you have to work so hard to feel good about buying the Porsche. The comparisons are like apples and oranges (tho no Ford Camry's (sic) vs formula 1) but I don't think in the way you intend. The fact is that once you have driven a 3 with an open mind, all of the ICE cars feel pretty dinosaur, tho possibly quite thrilling (Mclaren, Ferrari, and , yes, Porsche) but so is a horse ride if you get a really lively one! As far as "performance" goes, on the street you are gonna get mauled every time just because this thing has "throttle response" that makes that term obsolete. How many people do use the launch control on their Porsche? Dragstrip? Stoplight? I don't have a single friend (10?) that has a Porsche that has ever taken it to a drag strip. I haven't asked, but after one or two tries, I bet none of 'em still use launch control--I know that launching hard on the street is noisy and most people would feel like an ass doing it. The Model 3 will destroy your 4S even with launch control at any street legal (or even likely!) speeds (check out Nico Rosberg losing to one in 0-60 with a GT2RS!). It won't have the vroom vroom (tho you could probably figure out a way to add it for $100000!), but it will have a transmission that is just as engaging. As for track work, good video of a 3 passing a GT3 is out there, etc. etc.
In the end, you are right about one thing: you can't really compare them, but it because they are from different eras. Just in case you didn't read my previous post, I have owned and tracked RX-7 FD,e92 M3, 997.1 GT3; I still own and have tracked Series 1M, and I also own Macan S, and a GTI. The M3P+ makes them all feel like hobbies. So sorry about the clean, no nonsense interior and mediocre (by current standards, which is to say pretty good!) build quality (tho one of the best sound systems around!). It still blows my mind that they put in a wishbone front suspension--try finding that on a modern Porsche!