I think the OMS one is aimed a little different. It seems to me that it's made to mimic a 170 point mini-breadboard so as to make breadboarding and transferring a design an easier proposition. I kind of like the connected pads too. Makes for a much tidier result, but I'm sure there is call for both methods.
Plus the OMS ones seems a lot less expensive. 3 for $14 with free shipping. At that price I cant' go too far wrong. I think I'll pick up a set too.