My answer will be: Digitals
Why? Well many groups currently are selling well and breaking their own records but the digital performance is what makes everything different. A group that is able to pull good physical sales and at the same time good digitals is literally dominating.
I’m not talking about only korean charts but international digital platforms as well, it’s is super hard to be extraordinary in both but a decent digital performance can elevate more a group that already have physical sales. Digitals is also a good way to see how is the reception of the group among non fans because only fans buy albums let’s be honest.
What do you think?