Ugh. Where is the "None of the above." option?
I guess I'd pick Robinson of the two, because he's at least a strong rebounder.
But he's truly horrible on offense -- possibly one of the worst offensive players in the NBA. Seriously, for a true big man, he has an embarrassingly low finish rate on shots within 3-feet, just 64.3%. To give you an idea of how bad that is, the following players last year ALL had higher finish rates within 3 feet of the rim: Kelly Olynyk, Amir Johnson, Jae Crowder, Al Horford, Jonas Jerebko and Gerald Green. In fact, the first 4 names on there all had rates above 70%.
He's a good offensive rebounder, so two-thirds of his shots are all within this range. And yet he's simply not good at putting the [dang] ball back in the hoop!
And if you are looking for him to kick those rebounds out for someone else to finish, beware. He has a career 16.8% TOV rate (17% last year). The only Celtic last year with a rate that high was Jordan Mickey!
He's a terrible passer and has no feel for the game whatsoever. He grabs rebounds based on athleticism. But he doesn't _DO_ positive things with the rebounds he gets!!! And he's a truly atrocious shooter from all distances, including the FT line, where his career FT% is 50.5% (and it was well below that each of the last two seasons).
Thomas Robinson is not a good basketball player.
On the other hand, Josh Smith isn't anymore either.