So I beat the Wii U version a few days ago.
Really enjoyed it. I got most of the medals in the game so I unlocked pretty much everything. Those two extra songs you can unlock with vocals are really nice.
What's really interesting is that after beating the game you can unlock an option for extra dialogue throughout the game. I wonder if that's present in the Wii version?
Also the final boss fight is much easier (yet still at least the second most different) as you can upgrade your life bar and more importantly there are three checkpoints for different phases.
I put the game down for now but will probably eventually go through every level to see the added dialogue, get the last few medals and then do the Wii version. May switch languages to Japanese.
I'm interested if the medal locations are the same between versions. The Wii version doesn't have the radar feature which made finding the medals much easier in the Wii U version. There were still some hidden behind enemy encounters or located underneath islands. The ones hidden under other objects that show up on the radar were especially devious.
Got my Wii U/Wii copy from the GameFly sale. Also just started the 3DS ver. controls are kinda....not good. Any tips?
Use the Y button to float upward into the air to aim your next attack. When you radar shows attacks about to hit press Y and a direction to dodge. If you spam this you'll basically avoid any attack.
Press B to Dash towards targets quicker but be sure to land and then press y quickly.
Wait to get the gun power up in a few levels and you can just sit back and kill enemies from afar without worrying about losing energy.
Finally upgrade your abilities.
The final ability you get late in the game is really effective at killing enemies with little actual skill from you.