the main reason I got the s21+ instead of the ultra is the camera issues that the ultra was having on launch. I was also told that the s21+ has better slow motion however I can't find the specs anywhere? 🤔
I think the s21 does 4k slow motion video while the s21 ultra with its bigger sensor can only do 1080p slow motion. it's on the Samsung website here is a screen shot for you from website.