I've gotten mixed opinions on both of these cab's and after playing both I have to say that the Mega doesn't seem to put out the "wall o' sound" that I thought it would compared to it's little bro G. Senior. A plus is that it can take a bit more power. I have a Big Bertha that I am still undecided on as to whether or not I will keep (way more bass output than I need) and I have a Goliath III 4x10 that I am loving. I am just wanting to get thoughts/opinions from SWR fans who have either/both of the cab's and get pro's and con's. Thanks for any help you can give. BTW I play all kinds of music and the sound of the Goliath 4x10 is serving me well but I need to move a bit more air with my rig.