I like GNR a ton, but i can say that i like Metallica too, I mean like back in the day Metallica, because i can not listen to Reload. I have the album and i honestly since i got it havent listened to the whole thing yet, because the first couple songs i think are insanley boring and just really awful, in my eyes. But hey, some of you probably like that album so im not going to press my opinon in which of there stuff is better. Personally, I rele think Slash is better. Kirk Hammet can pull out some speed, and awesome licks(Master Of Puppets) but i honestly like Slash better. When it comes to the mastery of technical stuff and speed, id go to Hammet, but when the time comes to look more for the emotional + creative side of playing, lets learn from Slash. I think you would benefit more as a guitarist if youd stopped looking for whos better, not idolizing only one great guitarist, and combine them and learn from them both since both have qualities if put together would make a rele awesome guitarist.