Has any one been on both Vision ots and carnival Valor?

Valor is the only cruise ship I've been on. It's probably the smallest sz I'll want to go on. We are looking at Vision ots. Is it same sz or smaller than the Valor? I know Liberty is larger but we are wanting a 5 night not 7 night. Is Vision a nicer ship?

Vision is significantly smaller than Valor. Vision is around 78000 gross tons, Valor is 110000.