S.Peelman on 12 March 2014
You forgot about the save feature.
The NES game couldn't be saved so it had to be completed in one sitting (or one could conveniently use the warp-zones of course and be honest about it), while the GameBoy Color remake features a Super Mario Bros. 3-style level-select which besides from letting the player select levels also automatically saves your progress.
To me this was the single reason why I used to prefer this version over the NES version, which I never completed myself contrary to this remake. Personally I never found the reduced field-of-play and the controls to be a big hindrance.
Though maybe all that's pointless now anyway considering VC has save-states.
