I don't own either but in a way I own both..I have a pair of the old Yamaha 15 Inch MS-400's which I think are fine considering I paid $400. a piece for them when they were being discontinued in the U.S. Market..The newer 12 Inch MSR 400's don't seem as highly regarded..I also own a pair of the not so highly regarded EON G2 Subs..For all the message board criticism of them,I think they do fine for 43 Pound 15 Inch Powered Subs.