work together
First let me say that I doubt very much that your friend has more game then you. If anything his tactics are different from yours and get results in different ways. I have a group of wingmen in my arsenal, good wing men who look out for one another and always offer advice to one another. Each of them has their own style and gets there own results.
Sounds like your friend would be a good wing man candiated and you should go into battle together and see if you can play off him, not against him. Although being competative with someone you know will get you results too and can help you become a better DJ overall, I also find that having a good select of guys who can help you out from time to time can be far far more valuable.
Plus, even though it goes unsaid often or your friend tells you it's okay, if you're always going after the same girls you will put some sort of strain on your relationship and they'll subcontiously help you less down the line if they think there's a chance the two of you may have to compete in the future.