I would choose the blue because of many reasons, It's lighter and shows the work and detail you put into this banner, very nice job.
Yeah, you should current it over the top one in your signature for sure, and pick the blue, it shows all the details and is calm; easier on the eyes as well.
The red is 100% monotone red, and the blue contains some cyan and some yellow as well. Blue > Red, and for effects, I don't like the Lines and circles, original, not yet whored, but I don't like it. You presented it well, just the trend itself doesn't turn me on.
Blue is the best imo too. I do agree with Inverse however in that it needs some depth pretty bad. But, if you're going for a flat piece, it's great. Good work, I'd current. ^_^