I think all the demos sounded really good. The shredder in the first demo got a great tone IMHO for that style, as did the others, all being individuals with different tonal tastes. What I like about the first demo is that usually I don't hear much guitar in metal styles, I usually just hear amp. This time, I heard guitar along with amp, and that's what was cool.
But what's important is that a player can get an idea of what the guitar is capable of in these different styles by watching several videos like these. Then you can more easily understand what the guitar may or may not do for you as a player. At least, you can hear enough to decide if you want to try one out.
Anyway, thanks for posting these, everyone.
By the way, it's kind of stressful watching guys who can play and knowing that my hand is going to take a long time to come back to strength - if it ever comes all the way back, I'll be so happy!