Hmm, IIRC I do not believe the Maxspect units are dimmable, but you can control blue & white power separately. I believe the G2-160W has 3 power switches, 1 for 30w white, 1 for 3w white & 1 for 3w blue.
I have been very tempted to get the exact same unit G2-160W. There's a big thread on RC...