Rating matters in fight

EmperorLDrago

My 5*doc is at r2 while my friend is also at same but his ratings are 4.2k while mine is 3.6. but he is over level 45 while I am at 36 . Why this happened and do the difference in rating actually have dealing in fights as his attacks and hp are same with mine
Please help me out and thanks in advance guys

Kpatrix

Maatery points add to pi.