[MightyA6]

Depends. But I guess you'd have the best of it when it comes to the paper.
One thing to consider thogh, how far does gbmantis shoot? Does he make shots that consistently comes 50 yards further then you? Since then he'd be taking an advantage of the white starting position and 'plus' number of shots you get.
His variance is also suspected to be lower with a 10 handicap difference.

So I guess it comes much down to how much variance there is in your play.