One side shows which parties were voted for in the popular vote while the other shows how many seats each party got thanks to the unfair first past the post system
It’s a votes to seats thing, I believe. Like how in the federal election the NDP got 25 seats and the Liberals got 150+ but the NDP recieved well over half the votes the Liberals got. By that metric they should have gotten over 80 seats yet instead have to make do with less than a third of that.