There is a difference in iron banner, it's kinda small but there's a difference. You can notice the difference when you're shooting the other players, I watched the video and you were dealing 19 on body shots to most people that were high levels and like around 26 on headshots. My suros does about 31 on body shots and like 46 on head shots if I fight someone a little lower than me (I'm level 28). There is a difference, I think they boosted players stats if you are lower than level 20 to level 20, however I don't have proof of this last claim.