I have not done a compare but I do know one thing, AGD is the only company using GAN Modules that are specifically designed for audio. Even Merrill's are repurposed. It may not make a difference ultimately (as I said, I have not done a direct compare) but it is something worth considering.
Incidentally, I am considering signing up to be an AGD dealer and have to say I am impressed with the gear.
Incidentally, I am considering signing up to be an AGD dealer and have to say I am impressed with the gear.