I'm listening with headphones and the guitar sounds fine on the right side, but on the left it seems less defined. I don't know if it's because of my headphones, or damage to my ear over years of abuse, but I think it sounds odd. It's almost like the right side is panned right 100% but the left side seems panned 50% left or something through these headphones.
Could be due to having the guitars play the same thing too. When I was starting out with heavy guitar in 2005, I tried to copy and paste my rhythm guitars to make it stereo. It doesn't work. I imagine that Shreddage probably doesn't use completely different performances for the same part, so that could definitely be the issue...
I really do enjoy the song though, and although there is some weirdness to the synth, I think it works well as a whole. I think the song could have been expanded on, perhaps even made more progressive, but it's great as it is.