I’ve never sailed Carnival so can’t compare them. However, Wonder has differences vs Oasis. El Loco Fresh is complimentary on Wonder. They have a machine that makes fresh tortillas in front of you. You add toppings like rice, beans, meat, cheese, salsa, guacamole, chips. Similar to a Chipotle. Most days it was good, although one day the guacamole was watery. I’ve been on Oasis and Wonder, Wonder is a beautiful and fun ship, we enjoyed it more than Oasis. Booked another cruise on it because we had so much fun.