Okay I'm going to start with the ds version first. The ds version is the most nostalgic sonic game I have ever played. Yes Sonic colors for the Ds was my first Sonic game ever. And I am grateful for that because the Ds version is actually pretty fun. It's sorta like a dumbed down version of Sonic Rush but Sonic Rush is waaay better.
Okay the Wii version is soooo fun. The 3d and 2d work so well together and males the game great. The gameplay is super fun and enjoyable. The wisps in the Wii and Ds version work really well. The make the game so much more fun. But more in the Wii version. The ds version has like 3 or something less wisps but it's still fun. The interactions in the game between character are awesome and at moments hilarious. I like them better in the ds version because shadow and other characters are in it. Anyway Sonic colors for both versions are great games and I definitely recommend them
Wii version: 8/10
Ds version: 5/10