As usual comparing groups between generations doesn't really make sense. Every generation was more successful than the previous one as the Korean wave kept expanding (although 4th gen might be different, we'll see)
I'll just say SNSD were immense for their time, especially in their home country.
But Blackpink and Twice clearly have had more success, it's just a fact.
Too early to tell for New Jeans, but unless K-pop craters in popularity they'll end up having more success too.