If the advanced version is what I think it really is then it's basically the regular G&G (like the ones Ken used to sell before CAS got an exclusive contract).
G&G has 3 lines, Top Tech (high end), G&G (mid end) and Combat Machine (low end). As they don't want to "dilute" their Top Tech namebrand they will not make Cansoft Top Tech guns, so that leaves us with G&G and Combat Machine corresponding to "Advanced" and "Rec" versions. This is all speculation and there have been posts about some of their guns being halfbreeds between Combat Machine and regular G&G but only time (and some reviews) will tell.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE