I prefer the pools at Cabana, but if you want that Express go for Portofino. Also, Portofino is more relaxed/romantic. Cabana's more high energy and fun. Both have their strengths, so it may depend on what you're in the mood for.
EDIT: Also, food is much less expensive and more options on the cheap at Cabana. Portofino has a little pizza window with some grab and go sandwiches, but everything else is sit-down and pricey. I like the easy cheaper food court style quick service and the two poolside lounges at Cabana better.