The reason Tayan's prices have fallen is it doesn't appear Porsche is moving them very well. I think you'll continue to see pricing pressure on Taycans. Here is a quote from another website regarding their current sales.
"In Q2,
Porsche sold 1,635
Porsche Taycan electric cars (all versions), which is 35 percent less than a year ago and the sixth consecutive quarter of year-over-year decrease."
I'd really consider how you plan to use it and what about the Porsche you like better than the S and vice versa. As an aside, most people don't upgrade their brakes. For the vast majority of people, the stock brakes are fine. I would also argue that the Tesla brake kit is higher spec than any available from Porsche on the Taycan.
I'd also look closely at the warranty. The early Taycans have very short battery warranties. I think they were 80k miles. Their drivetrain warranty is limited to 50k miles. The drivetrain warranty has stayed the same for the 2023 models but battery increased to 100k miles. All are 8 years in duration. Compare that to the S which is 150k miles and 8 years. I assume the warranties are similar in the EU for both as the US. Both Porsche and Tesla have the same point of 70% battery remaining, 30% degradation point for battery replacement.
The range is clearly better on the S if that matters to you. Keep in mind the Porsche's already low range is going to further deteriorate with time. You could be at 25% battery degradation after 6 years and the battery is still in spec. So your 200 mile range has just become has just 150 miles. Not mention keeping your battery at a high state of charge (which you would more likely need to do with the Taycan to get the range you might actually need) does accelerate the degradation of the battery.
If acceleration matters to you, there is nothing else like the Plaid. It has been an amazing car for me and this is my second S. I bought a 2022 long range first, ultimately sold it and bought the Plaid. Before I bought the Plaid, I drove all the other comparable EVs out there and still came back to Tesla. The only other one I'd consider than the S, would be the Lucid. Even then service could be an issue and the long term viability of the product. As for the Porsche, there were things I liked better about it than my S but not enough to move me. I also had concerns about how expensive it would be to repair the 2 speed gearbox they have when out of warranty. Just more complexity without much benefit and another thing to break.
I am not someone blinded by Tesla and think everything they do is awesome. It is still a very difficult car to beat in the overall value it brings. I planned on keeping my Plaid long term and the 8 year, 150k warrant on the battery and drivetrain were an important factor. Porsche's warranty was ridiculously low initially and still mediocre now. My past experience with German cars has taught me to sell them when out of warranty as when anything breaks, the repair bill is going to be expensive.
Good luck with whatever you buy. My friends have Taycans and like them. A few of them I've let drive my Plaid and it gives them buyer's remorse
as they enjoy acceleration as much as I do. The Taycan is fairly quick at launch (at least the Turbo S two of my friends have) but at about 60 mph (100 km/h) they fade to about as quick as the S long range where whereas the Plaid still feels like you have rockets strapped to it by comparison.
