In my opinion the original game was slightly better than Risky's Revenge. Not only was it twice the length but it was much harder, with many more secrets to find. And something about such fluid animation and detail on 8-bit sprites was really impressive. Shantae's dancing was also customizable with appropriate music beats for the different moves, rather than silently cycling through the different stages.
That said, if Risky's Revenge was your cup of tea, you'll probably like this one too.