Is treasure a bigger success for yg than ikon and winner because of their sales?

Depends on how you define success.

In term of money, yes, treasure will bring in more money due to higher physicals sales and presumably better concert attendance.

In term of legacy and recognition, NO. Winner and ikon are by far more widely recognised than them as both these groups have hits close to national hit level.

YG decided to go a very different route with Treasure. Unlike Winner and Ikon, Treasure's main appeal is to young female fans. They wanted to create a group that sells a lot and can have a large fandom. In terms of digitals, Ikon really only did well their first year and then with Love Scenario, and Winner hasn't done well in digitals since Millions. Only time will tell. I don't think Treasure will ever do as well digitally as the other two but I definitely see them bringing in more money, but that ain't going to happen if they go on hiatus every year....

they aren't flops people that say that are haters but they still haven't reached 700k yet and lisa sold more thsn 800k +

and winner and iKON have some successful songs that have done very well on charts.