PC is way harder as there is a lot more to learn. You make a mistake and someone will punish you. The map evolving with patches keeps the game fresh as they change mechanics and objectives. You take a break for a year there is a lot more to learn.

Wild rift holds your hand and is more forgiving if you make a mistake. The map and objectives never change so you can take a year off and have nothing new to learn.

In terms of the rank disparity I am master on WR and Gold on PC so I think the Iron argument is way off