Horus was first.
Horus was around WAY before the story of Jesus was. How do christians explain this? Well, they can't, so they pretend it isn't true. Unfortunately for them history has proven otherwise. Horus was an ancient Egyptian god, worshiped since before 3100 B.C.(the Pre-Dynastic period). There are tons of other religions that also have a son of God born to a virgin and end up being executed for redemption. In these myths the main character plays the "hero". It seems to be a common trend, and unfortunately for christians christianity was not the first to start it.
sources: The History Department of your local college.