I can't compare to a Ruby, but compared to a Jett it's much less padded. I'd guess it's probably about the same as a Ruby on that front.
It's very crowned, and I worried whether it would be wide enough where I need it to be, but it supports my sit bones just fine. The curve makes it effectively more T shaped and makes the cutout effectively larger. I'm happy - but again, I never rode a Ruby, so I don't know how different they are.