I missed that. My bad.

That makes it easy. 6700 is the red-haired stepchild of Ultegra (apologies to any red-haired stepchildren reading!) and has a bit of a marketplace stench to it now that 6800 is out.

I'd avoid a 6700 bike unless it was a SMOKING deal, personally. Plus- this means it's a 10-sp to 10-sp comparison. Go 105, save the money, or go 6800 and feel the sublimity.