The SR505 vs an old MIJ SR600. Both are used guitar. SR505 pickups are Bartolini MK1, in the SR600 I'll change the pickups for EMG PJ-X.

In that compare, which would be better for metal music(Dismember, In Flames, Carcass, Soilwork etc.)?
I'd go MIJ if you can, they seem to have higher QC on average
2002 PRS CE22
2013 G&L ASAT Deluxe
2009 Epiphone G-400 (SH-4)
Marshall JCM2000 DSL100
Krank 1980 Jr 20watt
Krank Rev 4x12 (eminence V12)
GFS Greenie/Digitech Bad Monkey
Morley Bad Horsie 2
MXR Smart Gate