After looking at each group digital performance (Korea and internationally) and physical sales per release, considering some groups might be strong in both but one is arguably bigger this is my conclusion:
-2NE1: DIGITAL
I don’t think I need to explain this one, they were queens of digitals.
-BIG BANG: DIGITAL
I don’t have to explain this one neither, they dominated digitals and have many hits in their catalog.
-SNSD: PHYSICAL
Nations girlgroup have plenty hits in Korea but their physical sales stability even with Japanese releases considering the era they debuted is astonishing.
-Super Junior: PHYSICAL
One of the best selling groups ever. Big winners of Gaon quarters and till this day showing incredible consistency on physical albums.
-Shinee: PHYSICAL
Physical wins for this one specially with their new album becoming their best selling one ever.
-EXO: PHYSICAL
Kings of physical sales with over 12M total sales. The artist with the most Gaon quarters awards ever.
-IKON: DIGITAL
It’s a proven fact this group strength ain’t physical sales, their good digitals and performance on korean streaming charts win by a lot.
-WINNER: DIGITAL
Just like IKON they are a digital powerhouse rather than physical.
-TWICE: PHYSICAL
People might argue about this one but they are more consistent with their album sales (korean and Japanese releases) than with their digitals.
-BLACKPINK: DIGITAL
Debut song got a PAK and instant smash hit, continuously breaking streaming records even tho their latest album sold 1M, which is insane, they need more releases reaching that to overtake their digital numbers.
-SEVENTEEN: PHYSICAL
Sales growing insanely each year and making them enter in the top 10 of best selling groups in Korea history in less than 5 years.
-RED VELVET: DIGITAL
Everybody knows the girls rule digitals, their physical will definitely go up next release looking at the members solo salsa but not enough to overtake their digitals.
-MAMAMOO: DIGITAL
The past few year their digitals just keep going up, getting big international hits as well. As many ggs unfortunately their physical sales ain’t that big but really stable.
-OH MY GIRL: DIGITAL
Digitals and physical sales growing at a fast rate but still digitals dominate.
-NCT: PHYSICAL
Their strength is hands down physical sales, they are unstoppable now still reaching new milestones.
This is a hard one not gonna lie. The group has 8 albums with over 1M sales and massive streams and digitals in Korea and internationally. So for this one I have to say it might be both.
I only did these groups for now, curious about y’all opinion.