It's a toss-up, really.
If you want to do light mapping, for example, DBC doesn't support it (as far as i know), but DBPro has this little (dll I think?) program called Dark Lights which light maps levels for you.
Light mapping is the process in which you "light" your level by doing the following:
1) Creating a bunch of textures, properly colored and blurred to give the effect of "light" falling on them
or 2) Using a level editor which supports light mapping.
Cartography shop 4 is very good for light mapping, and as far as I know can work with DBC in the .X file format.
But what I was getting at is if you want full light mapping capability, go with pro. I wish I did, but that's just me.
Wii came . . . Wii saw . . . Wii conquered!
