Tone down the lightning in the first one, its a bit bright. 2nd one is awesome, really like the colours. I like everything except the brush around the guitar.
The first one isn't bad. A little bright, and the blue parts are kind of random. I don't really like the second one. It's kind of blurry... not sure what you were going for.
to much light in the first. the second is kind of blury but i love the blue line wrapping around the guitar