I don't think so... just that I found better to improve the low level at the academy and get more for preaching after reach the 50%. Since you're more skilled in oratory, your preaching will be better and I imagine your oratory will increase even more, but it's just my own theory. Also, the results of the preaching would be better to convert people.
I started a religion as well, but with no time to invest and with Madina going to hell, I will just sell my preachings elsewhere when the time comes.
