The Star lounge usually very crowded as some Taiwanese Amex card member can access the Star lounge.
Food wise, I prefer SQ lounge but sadly the lounge is not available for evening flights as they closed at 17.45.
Spirit wise, The Star lounge selection is much better than SQ lounge. They serve CAMUS XO and Glenfiddich 12 comparing to Hennessy VSOP and Blended scotch whisky in SQ lounge.