If you're in the market for the Taycan, you'd probably be in the market for the 2020 Roadster [0]. While it's still in pre-production, these two cars seem to me to be the real competitors (both electric sports cars, with very fast 0-60 and 1/4 mile times, etc.) over something like the Taycan vs. Model S.
[0]: https://www.tesla.com/roadster