Rr gain question...

So I'm currently s3, duo at gold 1. I gained (35) for being match MVP at s3, other is rr my duo made (33)for being 4th place on team at g1, how did he get similar rr to me when there is a vast difference between us on leader board and when he's higher rank?(yes i know s3 and g1 are not that far) my duo is fade