TNT is a stronger network for P18-49 viewership than TBS. The two networks performed similarly in Q1 2021, but that's before NBA playoffs on TNT start.

TBS and TNT are in nearly the same number of U.S. homes as of this month:
TNT: 81,789,000
TBS: 81,342,000 pic.twitter.com/lsrTd0du7w

— Brandon Thurston (@BrandonThurston) May 19, 2021