RealGM

Both defensive beasts. Mobley was only a rookie but played All Defense level, while JJJ was selected as All Defense. JJJ has more range, but is also more injury prone probably.

Who will be better next year?

Isn't JJJ injured and going to miss at least the start of the season? If so, it's a pretty easy decision (especially if there's some time to work his way back into form even after the missed games).