I will admit to being less than knowledgeable about the Culexus Temple, since they are my least favorite in terms of cool models, and I have never fielded one. With the Grey Knights coming up, and anti-psyker weaponry possibly climbing the charts in demand, this might change. And I'll admit, the massive face cannon is beginning to grow on me. If I can even make myself like the Callidus model, I am sure I can bring myself to like this bad boy.
I'm not going to go to the trouble of comparing the different models of these, because it occurred to me that anyone who has access to this site also has access to the GW site, and is probably familiar with what the model looks like in any event. Besides, there is no Inquisitor 54mm scale model of these to contrast with.