Oh of course, its Donkey Kong after all ;p
But the 3DS version has 8 extra levels and new modes, including an easy mode for first time DK players, like I will be.
Plus "high voltage developers" said that the 3DS has way more better textures & shader abilities then the Wii. And we know that the 3DS has a 4-core 1 GHz CPU (ARM11) that can't be underclock any lower then 350 MHz a core which is better then 729 MHz 1-core CPU in the Wii, plus the 3DS has a 400 MHz GPU that does 40 million triangles at 100 MHz & 160 Million polygons at 400 MHz while the Wii only has a 243 MHz GPU with a minimum of 30 Million triangles. Plus the 3DS CPU & RAM & so fort has better architecture then the Wii.