The Conrad is quite a bit better than the Hilton. (I did 2 weekend nights as part of my diamond challenge in both hotels). If you're comparing sgd260++ and sgd330++ (or thereabouts) I would say the extra sgd70 is worth it, if for nothing else than the better view, newer and more posh rooms, and overall better service.

Booked base / cheapest King room, got upgraded to whichever room it is that was really high up + facing Pan Pacific Marina Bay. I do also note that the 31st floor lounge was really packed for Saturday cocktails, but it was really pleasant for Sunday breakfast (better spread than the Hilton's EL, plus cook-to-order eggs).

Opposite the Conrad is the Millenia Walk mall which doesn't really have much in the way of local food offerings. Taking a left turn goes to Suntec City (Food Republic in the basement), but I would suggest turning right and going to Marina Square instead. Next to the foodcourt there there's wee nam kee chicken rice and lam's signatures -- I like their salt baked chicken thigh.