Austin, it looks like the main difference between the one you originally posted and a bowl gouge is the space between the wings. If you go back to D-way's site, you'll see that the one you posted is very similar to a bottom feeder grind. The difference, however, is that the bottom feeder is a V or modified U, whereas the roughing gouge is a wide U.
Funny thing about turning gouges... we say bowl gouge, spindle gouge, and roughing gouge. But the last one SHOULD be called a spindle roughing gouge. We haven't even gotten into the fluteless gouges... But I don't know enough about them (never used one, though I've heard good things about them) to carry on a discussion about them.