should i get metal method or guutitar world learn to shred

[Cam-Vai]

i need to know which one to get
metal method (stage 4-6) or learn to shred i play blues (srv, hendrix, john mayer mostly) and wanna start shredding
if i get metal method what level? i can play songs liek the attitude song, satch boogie, eruption (nearly full speed)
and is learn to shred good?

cam