I'll add my thoughts as a MX owner. The MX has been essentially pushed to the side as my wife's car. It used to be the family car and always what we took if we were going anywhere together or with the kids and my M5 was only for me and if I drove the kids by myself. Now it's flipped, the MX only is driven by my wife and if we go as a family the Taycan is the preferred car.
I'll echo what others said about pedal feel. But for me that's a positive. I personally like that Porsche went more down the path of a traditional vehicle as opposed to the golf cart sensation. I have never really liked the on/off feel of our MX and the overly aggressive regen braking. It's just... just... it's a golf cart. I like that Porsche is doing a normal acceleration curve on the pedal and does regen on both coasting and mechanical pedal push. I imagine it's also going to appeal more to the masses as opposed to the Tesla fans.
Charging comments here are interesting b/c we're the opposite. For us in the midwest, we're much better in the Taycan. The faster charging doesn't seem like a huge deal b/c it's minutes of difference but on a road trip it really adds up. Add to that, Electrify America has a stronger network than Tesla does. We did two trips, nearly identical routes, and the Tesla was longer and less convenient charging spots. Taycan, despite the lower range spec, was fewer stops, better stops, and faster drive overall. I mapped a route to Denver for a friend and it was the same (although not as drastic). I mapped a route to Dallas and it was hours different. For charging, people have to look at 1) will they even care as many may not ever plan to road trip their Taycan; 2) what would their destinations likely look like; and 3) what is outside their ideal list but still something of interest. Factoring in all three they could see if it matters or not. But the key here is geo makes a big big difference.
Not as obvious in around-town but holy smokes the road noise difference is jarring. The Tesla's are so cheaply made compared to the Taycan and I think it really shows in road noise. We had to keep radio on non-stop in the tesla to just offset the droan of the road noise. Taycan is like a freakishly quiet cabin. But in a good freaky way. No comparison. We felt tired getting out of the Tesla but didn't have that problem getting out of the Taycan after 6 hours.
Someone else commented on the sounds in that the Tesla doesn't make noise but the Taycan does - this is a federal safety requirement. Tesla's will get updated to do so as well. I can't remember when it goes into effect but Taycan's are shipping with the requirement already in place.
The con's with the Taycan are the infotainment system for sure. Yeah, it's not a Tesla with an iPad that has wheels strapped to it but I don't even care about that. They didn't ship with wireless apple play as they said which is a bit irritating - not so much that I'm an apple play guy but just that they didn't deliver and that bugs me. Overall I'm fine with the native interface b/c I don't care about some of that other crap you get with Apple Play. But the server connection they use for the widgets aren't reliable and are slow as all get out. To me, this is their biggest miss. I'd also say there are some ergonomics that suck. Getting in to the arm wrest is laughable. I'm not a fat guy but I'm not lean either and it's a contortion act. My dealer had one for a week and she laughed about the same thing. There just isn't a good interior spot to toss your phone or change other than a cup-holder. There is a nice space under the center console but it's hard to reach into. Also, the plastic piece along the B column/pillar is going to be hard pressed to not look like hell in a year. It takes a lot of abuse with getting in and out of the car.
With respect to OTA updates. Eh, so what. If the car works and worst is a visit at the dealer every year or so for an update I don't care. They give me a loaner, takes 15 min. Ideal? No. But a big deal? No. Would OTA be better? Hell yes but I also understand why they don't. In our Tesla, I used to track the release notes and the comments about the software but eventually got to where it was never anything of consequence and felt more often than not, time spent making my car fart (not making that up) was time that could have removed the bugs with water sensing windshield wipers. Time spent making the screen show it's in dog mode could have been spent focusing instead on why the car would do a death squeeze on you when you tried to get out. Really seemed they cared about the marketing buzz of new quirky features more than they cared about the operational bugs they already had or introduced in each drop of the code. Take this a step further though... holy crap trying to get warranty work done on the Telsa is ridiculous. You cannot call them. Let me repeat - you CAN NOT call them. You have to use the damn app. Like, for christ sake man you took 90k from me, if I want to talk to someone about scheduling service let me do it. The app is a nice to have but making that the only choice for service is stupid. Or not knowing if they'll have a loaner. I don't want a damn uber credit. I want a car. Especially when you can never hit your target for completing repairs.
Overall the biggest thing though, and why I can't stand Tesla to Taycan comparisons, they are apple to orange with respect to quality. Tesla's are made with super thin metal, really flimsy plastics, and of course fake leather. They're just flimsy. And I'm not even getting into the quality and long term ownership challenges we're already seeing on a MX that's not quite 2 years old. I washed the MX yesterday and I'm always shocked at how flimsy the metal panels are and you feel them bend and bow when you simply go over them with a soapy sponge. Or how the 'chrome' pieces have sharp rough edges like the old school plastic toy packaging that held pieces of your transformer together after being cut out of the dies. Then I wash the Taycan and it's just solid. Interior on the MX we have loose edges of fabric that hide the moving parts like around the steering wheel but it's literally just a curtain hanging in the air not even attached at all sides. And the rattles. jesus christ the rattles. LOL I just can't imagine anyone buying a MS performance when a Taycan 4S is about the same price. The Plaid had better get a whole new factory and forklift on quality given it's price point. And to think, the Taycan is the first real luxury EV. Just think of what will happen to Tesla MS's and MX's when Audi, BMW and Merc finally come to the table.