let me ask you a simple question,

If you buy the New Preve and drive it, would you always wonder how it will be like if you have chosen the second hand 308T ?

if you buy the second hand 308T, and drive it, would you wonder how it will be if you have chosen the New Preve instead?

funny i have a very different experience, when i was choosing my current ride, I'd nailed down to 2 choices (after ruling out a lot more), one is focus (even waited for it to be launched to test drive it twice) & another is 408

I don't know why, I never wonder what it is going to be if i have chosen a focus instead ever since.

perhaps your current ride is not so satisfying or being criticized to much? I can't help it if you are not satisfied but if it is about how other talk bad /questioning about your current ride. Know this, you have probably made your choice based on your best understanding of your choices matching best to your need at that time, You have prioritized what is important to you then and made the best choice then, perhaps your priority has changed now.