Elite has fewer hot food "slots", so I imagine that's the reason. The food items that are available today in Elite are also available in Polonez, but Polonez has a few extra items. From what I can recall, there are chicken and beef mains, and a basmati rice in both lounges, and main lounge also has some other sides like gnocchi, etc.

Booze makes sense. While I may drink a lot of it, I stick to wine or beer, so I don't really notice the difference with spirits. Thank you!