I will start off saying, I'm not the best tank. I will use a recent Shinryu run I did for ships and giggles. Not too sure about the SMN, but he also seemed to be about my level maybe even greater.

But to get to the point, I pulled 5k dps (WAR btw) and the SMN pulled 8k dps. I did 62.5% of the SMN's dps. That seems like a pretty good difference in dps between tanks and dps, at least to me.