I always hear "EUNE haha so bad xD" or that diamond EUNE is silver EUW. I mean I played on silver acc on euw and the players were bad like they should be for silver, I actually dced for 5 mins and still won top with 22 kills.
After master/challenger, I can agree EUW is better, because all the pros play there. But bronze-diamond1, I think it's all the same.
Anyone had experience playing on both serves for a longer time ?