Alt-J, stylised as alt-J, are an English indie rock band formed in 2007 in Leeds, by Gwil Sainsbury (guitar/bass), Joe Newman (guitar/lead vocals), Thom Sonny Green (drums) and Gus Unger-Hamilton (keyboards/vocals).
Monoral is a Japanese alternative rock band signed to Sony Music Japan.
 The band consists of Anis Shimada on lead vocals and guitar and Ali Morizumi on bass and guitar.

Question: Which band has more members, Monoral or Alt-J?
Answer: Alt-J