My only real complaint about inquisitor is at 54mm the official models are fragile, and the scenery has to be largely home made. Converting is fun though, and the models can be bought very cheaply!
Don't get me wrong, I game in 1/35/54mm, but sci fi scenery at that scale is hard to come by. And there's only so many ruined European towns that can be scourged by the Inquisition!
I think Mordheim wins out because of the plethora of figures and terrain available.
Drop inquisitor down to 28, now you've got some competition!
Are both rule sets still free?