If I use the o rings that @Zef posted on here then it's a wash. But forget it with the stock o rings on the Ultimas.I've had the opposite experience; I can easily change out my gloves with Ultima rings, but once I have gloves installed in the Rolock 90s, they're IN THERE.
I've had to change R90's twice in the last few months on a boat. Fully kitted up and no issues, both times less than 5 min.