Flew CTG round trip. On the way down, I was impressed with printed menus, abbreviated/multi course meals, Delta One wine glasses, amenity kits. The return (no predeparture as is common in Latin stations tax wise), choices were pasta or chicken (no other details at all) and and a one tray service with tiny wine glasses. I wonder why such a huge difference in service. Only thing I can think of is that it is round trip catered but it certainly confuses the pax impression of Delta's premium service on this route.