There is no difference between the R3/SGTI/Putra stock camshaft. They are all using standard 4G93 cams. The only difference is the R3 has one adjustable cam pulley factory fitted (can't remember whether its the intake or exhaust pulley).R3 camshaft's lift and duration is higher than normal satria GTI
R3 Camshaft > SGTI & Putra > MMC 4G93(Normal 4G93 from japan halfcut)