The appearance of GBS depends on the light. No matter the light it's always amazing though.
Here's some pictures of my car from member sbxjap
Here's my member journal for more low quality iphone pictures
http://www.ft86club.com/forums/showthread.php?t=7268
My honest opinion....
I can see why this is difficult. They're both excellent colors in their own ways Red screams sports car, blue is nice and mellow about it. In the sunlight, GBS and DGM really do it for me. Subaru really used a proper red for these cars, it's not a boring/generic red by any means but it just didn't do it for my quite the same way the mellowness of GBS did. I try to not attract attention in my cars because I'm frequently driving a bit spirited...Also, My family has a history of having bad luck with red cars so I didn't consider it an option.