I have had various sticks and Roku highest end models and then got the latest ATV with hard wire port that adds Dolby vision and high frame rate HDR. I have a 2022 high-end TV.

The video quality is noticeably better. Not sure of older ATV, but this is clearly better than the top end Roku. Also, I’m not sure if it is the same on older tvs

The other thing is that you want to hard wire if at all possible. Even the best wifi can’t touch the reliability of a wire