3:30 may have been a bit of an exaggeration, but I've been krushed in under 4:00 a couple times, once 3:45 for sure.
Pharaoah and Priest against the Prom means less econ from the pharoah and less scouting from the priest
at 4:00-4:15, most of the villies are going to be on food, not gold, so the oracles can still raid the gold villies and then if the Isis player pulls food villies over to help, his econ is even MORE hurt.
Once you do advance you can continue producing citizens and econ undisturbed, erst the while Isis's econ is constantly being harassed. On top of that, Isis likes to produce 20 to 22 villies in classic, but will have to produce less than that *himself* to avoid taking too long to get to classical.
I still say it comes down to who's the better player, not who's using the OP civ.