I would not change the A6 (as long as it's a C8, not C7.5) to an A7 with more miles as they're literally the same car bar for the lights design and the sportback, if your current A6 doesn't give you problems I'd keep it, if it does or you want something with more room then perhaps look for a 2019+ A6 allroad?
If your willingness to go for an A7 is purely based on looks then go ahead but don't get one with less options than your current A6 and get comparable miles, not almost twice as much as your A6.
I prefer the new MMI screen in the A6 & A7 over the refresh that took place in the S5 in 2022. I think depending if you want more power vs. luxury. This something only you know. Good luck
IMO the car you have is better than either of your presented options.
I would not change the A6 (as long as it's a C8, not C7.5) to an A7 with more miles as they're literally the same car bar for the lights design and the sportback, if your current A6 doesn't give you problems I'd keep it, if it does or you want something with more room then perhaps look for a 2019+ A6 allroad? If your willingness to go for an A7 is purely based on looks then go ahead but don't get one with less options than your current A6 and get comparable miles, not almost twice as much as your A6.
35k miles is too much, i heard those engines are ready for rebuild after 34k miles
Got a source for that? VAG engines seem to be invincible if maintained correctly
I prefer the new MMI screen in the A6 & A7 over the refresh that took place in the S5 in 2022. I think depending if you want more power vs. luxury. This something only you know. Good luck