I think EV's will run pretty close between bet and C/C. Neither one can really be a mistake.
I personally like have pair+FD in my C/Cing range.

I might be wrong but, I think you should bet, since the bb is supposed to have a large range, and there a lot of draw in is large range. You block two spade if he call with the spade draw so he's less likely to hit it and you still have a spade draw if he have a better hand now. I would bet small to possibly call a raise from him if he does not raise too big. I don't want too give him a free card where he can hit a straight a better flush a combo draw to beat you and an over card that pair his range.