Seriously, is something keeping you from going to a dealer and testing one YOURSELF? Only YOU can decide if the seat is comfortable, or not. Every forum I've been on there are people praising how comfortable their driver's seat is. At the same time, someone else is complaining how uncomfortable it is. The same goes for performance, unless you want to move up to the turbo, then it's a "no brainer".
I'll never understand why people ask these "should I trade" type questions on the internet. It's a personal decision.
Going to the dealer is a pain in the butt, and some people prefer to keep their interactions with car salespeople to a minimum.
Why are you harassing the OP who's already responded to your off-topic suggestions. Sounds like you prefer the in-person touch. Why don't you go hang out in the dealer salesroom and dole out some advice there instead?
On original topic, I have a 2018 GT and haven't driving a gen 1. From reports, it is much quieter with a more refined ride, slightly lighter steering, slower 0-60, and with a number of tech enhancements. I'd choose gen2 for the heads up display alone, as well as my preference for a more comfortable and more refined vehicle.