For Fact, Al Horner called the album "sublime", commenting that "on the adventurous, quietly subversive Saturation II, [Brockhampton] dare to imagine a better hip-hop world to blaze trails in".

He however warned of a "suspicion that Brockhampton could do with reviewing their balance of quality versus quantity", criticizing "moments on Saturation II that reduce its pace to a drag like the sluggish 'Chick'".

[21] Reviewing the album for AllMusic, Neil Z. Yeung wrote that "building upon the promise of its predecessor, II is another genre-blurring collection of thrills that's packed with even more wild energy and potential.

"[17] For PopMatters, Christopher Thiessen praised the group for "creat[ing] a new offering that is equally refreshing and enjoyable by pretty much following their original formula to the letter".

[18] Ryan Feyre wrote for The Young Folks that "much like on their previous album, Brockhampton brings versatility on every corner of Saturation II, and … they’ve even one-upped themselves".