Topic: Quadmic vs, Octamic II PreAmps

Hi,

my actual setup is:

HDSPe RayDAT
Octamic II
ADI 8 DS

... I'm looking for more Mic Input Channels, which should be assigned to the Adi 8 DS.

My question is focusing on the quality diffferences between the Octamic II and the Quadmic PreAmps.
Is there any difference, and if there is one, how big is it?

Looking forward to your comments / help / suggestions.