Is there a difference between the Roman god Apollo and the Greek god Apollo?
No, there are no differences between the Greek Apollo and the Roman Apollo. The Romans copied many of the Greek deities and gave most of them different names. Apollo is the only one whose name is not changed. Wikepedia is a good start online, but is probably not the best one. I have found a couple of other sites you could check out to give you more infomation. Good luck on your research and I hope I helped enough!