Our only experience in an S4 on the CB was back in July 2019. We were in R401. From time to time we would hear a little bit of chair. scraping on the deck above but nothing that we considered to be the least bit objectionable or worrisome.
Our experience was the same as @voljeep Just not an issue.
Just a personal preference, but wife and I generally don’t like what we refer to as the “sidesaddle” suites. However our objection has nothing whatsoever to do with any objectionable noise from above. We just prefer the S3 category on the CB.