amfp

If concerned about GTS warranty expiration, you probably can get it CPO for more years and 100K miles. Think cost is about 3K. Fidelity has a warranty program too, can search for comparisons.

I would chose the car that would make you happiest. Would first drive a couple of TT's and decide what's best for you. 991's are a tad larger which is a plus and minus. To me, creature comforts, colors to my liking are a plus.