^I never saw the show at 33, but I went to the first tapings at Haven with several members of this board, and some remarked that there was indeed more space between rows.
Having been to tapings at both, I'd confirm that. It's basically like the difference between an older movie theater seating where there was just enough room for everyone's legs between rows and the modern movie theater experience with plenty of legroom. The seats themselves at Haven do seem to be pretty roomy, so I bet that they are wider. I'm big around the middle and even bigger across the shoulders and didn't feel cramped, although I didn't have room to spread out, either.
I had the chance to get a tour of Television City the day before going to a taping at Haven, I was surprised by how close in size the audience areas actually are. Haven's is noticeably narrower, but there doesn't seem to be much of a difference in depth, and there's just a lot more space per seat.
I'm sur it's been mentioned before, but I don't remember. How do the seating capacities compare in actual numbers?
It's about half of what it was before. IIRC, Studio 33 sat right at 300. For the first couple seasons, Haven sat 160 (but they would go above that with folding chairs if there was a big crowd) but for Season 54 they removed the back row of permanent seats on the left and right sections and 145 is now considered a full house.