Slayer and Guns 'n' Roses rifts

I tried learning the first riff by ear and after tried the tab. I was kind of close, had the tuning in drop C# (could be wrong) The tab says, I think it's called C# Standard.
The second riff was one of the first I tried to learn with my electric, at first I always alternate picked it, it sounded good to me and felt right while playing it. So now I tried to Economy pick it recently and it gives it a different feel, kind of like slow motion if I could describe it.
Song's named: Slayer - Disciple and Guns 'N' Roses - Don't Cry
The timing is off on both and not sure if the notes are correct on the second one
The tuning is too low as well
Some stuff I'm practicing