>>2750587They're different kind of games.
I enjoy MNsG more as an adventure, the plot is really funny, really wacky characters, traveling all around Japan is amazing, and the level design is superb, especially for an early 3D game (dat Gourmet Submarine).
GGA is a side scroller, probably the best Goemon game, it's like a culmination of al the side scroller Goemon games on SFC and more. Fun co-op and also great levels.
The plot wasn't nearly as engaging or funny as MNsG though, but it still had charm and funny moments.
I'll never forgive Konami for removing the intro theme and Impact theme on the NA version of GGA though.