Ossian It's like wondering wheter a 90lb. nerd with a H&K MP 5 (10mm bullets) is better than bruce lee in a fight. Whoever uses magic, is not buffing, but bluffing. So, yes, clerics beat a lot harder, thanks to their gods.
Perhaps, if the guy with the H&K did not have the time to draw the weapon...
The cleric is already buffed - DMM persist, remember. The H&K MP5 is 9mm, not 10mm.