The giant cod one needs 8 batteries. I think the planet req's just 4. Also I don't know about the planet, but the giant cod one has no failsafe setting, so throttle sets to zero on loss of signal. I.e. full reverse on a forwards/backwards esc.
I could be wrong on the second point, but that's the way it read to me.
A plus point is that the giant cod one is much better to use than it looks. It was a nice weight and feel to it.