I'll admit that the Taycan will be very nice looking, but it will also be about twice the price, if going for the same performance.
Handling: There is no way the Tesla will handle similarly to a Porsche. Steering feel, cornering, road feel. Porsche is the king of handling for a reason, and I'm anxious to see what they can accomplish with the low CG of an electric vehicle.
Consistency: The Porsche can keep doing pulls from 100% down to 10% charge consistently with no performance degradation. This was actually Porsche's main focus, an actual electric track car.
Fit and Finish: Again, anybody who's seen both a Porsche and a Tesla up close will know it's not even a competition.
Charge Time: The Porsche will charge twice as fast as a Tesla, which (assuming you can find a fast enough charger) is pretty cool for quick recharges.
>> price is not that ridiculous
This seems like an insanely unlikely combination.
So where the Taycan as a range places within that is quite relevant. All the signs at the moment are that it will price similar to the 911 ie probably starting at £65-70kish. But we only have one data point which is the £130k for the Turbo trim level.
Yes, a product that you can't currently buy is a good competitor for products you can.