Hrm, the whole comparison to rogue makes enough sense to me, but honestly they resemble bard-a-likes much more than rogue I think. They deal with the social skills above anything else and have many abilities which rely on twisting the thoughts of their opponents.

The title, btw, should read to rogue as paladin is to fighter (since you state - to rogue). Small niggle, sorry!

With regards to Summon Conscience, the diplomacy vs. will thing is horribly weighed in favour of the Consular. Between synergies, feats and kit, you can have a +30 to diplomacy by the same sort of time that a will-centric build can hit about +12. My personal suggestion would be to make it a diplomacy check with a -10 modifier to it, and to remove the bonus an evil creature gets. Maybe change it to 1 minute also, 5 minutes with an evil-doer in a campaign running holy warriors means for 3 or 4 of those minutes, everyone has likely been trying to kill each other already!