[jcanavera]

We've had both in newer Airstreams. The downside of the twins were the curved corner, and being next to walls which in cold weather make those beds cooler. Also the cabinet hangs over the end which means your head can only be on the curved end. Nice side is lots of room between the beds and the center rear cabinet which allows you to lay things on top.

Queen bed, bad side is it's a little on the short side (for me). And the need to walk around it. Obviously the sleep pattern of your partner may also affect your comfort level.
Nice storage in each rear corner on the tall cabinets.

I think if it were Patty's choice, we would probably opt for the twins. Mostly due to the ease of navigating the bedroom area.

Jack