I have a 2021 Yukon SLT without any fancy suspension and 20" tires and find the ride pretty good considering this is a big SUV. The ride is even better with my winter tires and wheels. I use 18" allows with 275/70 R18 and the higher sidewall allows the the tires to absorb the road conditions even better than the 20". That being said, they are a little noisier because of the more aggressive thread.
When you look at the tire size comparison, other than the higher sidewall, the diameter and width are practically the same.