It's not. There's quite a few differences, but I don't know enough about either to point them all out. I do know though, that the "v" in church latin would be prounounced "w" in ancient latin. ah-weh Yoo-lee-oos Ka-hee-zah (Ave Julius Caesar!) for instance. Actually, "veni, vidi, vici" is a better example (weni, widi, wici)
All I know is its annoying the heck out of my when my teachers pronounce things wrong...like pronouncing the j in jus solis. ::grumble::