I see this mentioned often and I'm wondering if this also applies to CO TATL flights on a 757, or only when comparing wide body to wide body?

I was very happy with DL's BE product when flying TATL from CPH-ATL. CO also flies TATL from CPH-EWR, which is a route that sometimes works for me, but it's on a 757. I'm reluctant to fly a single-aisle plane on a 9 hour flight.

What are people's experiences comparing CO's TATL product specifically on a 757 with DL's (or other carriers like SK) who fly wide body aircraft? Would be interested in both economy and business class experiences.

Susan