I liked the buffet layout on the Wonder (PC) much more than the Dream (EG). On the former, there was a lot of space around the buffet, you could walk on both sides and easily pop in and get something.
On the Dream, you could only walk on one side of it, not near as much walking space to get a good look at everything, and the later arrivals (1-2pm range) had to wait in line to go through the buffet. You could go back up, wiggle in between everyone and get to the desserts, but if you wanted seconds on the buffet, you needed to get back in line. Still a good experience overall, but PC on the Wonder felt less crowded during the lunch buffet.
EG had two buffet lines, I think they had some of the same things, but a bit later I think I saw carving station meats on only the left side. I did the right side (desserts are in middle) and there were no carving meats on the right (but plenty of other good things).
If someone goes to Cabanas, I recommend doing a good reconnaissance, walking around the whole thing, and then popping in to get what you want. Much of the same foods repeat and it's designed as 'stations', no need to wait in a long line by the door. After 3 days, I'm still not sure I got that familiar with the layout, and only on day 2 noticed that they had carving stations (previously I hadn't walked through that part of Cabanas).