Let's look at it broken down and compare:
GG V2
High Concentration Glycerol Powder (65% Glycerol) 1,500 mg *.65 = 0.975
Taurine @ 1.5g
OG GG
GMS+Taurine 7.5g Blend - 1.5g Taurine (assumption based on v2) = 6g GMS @ 40%(typical amount of glycerol per gram of GMS) = 2.4g / 3(scoops per serving size) = 0.8g glycerol per scoop
now my math could be a bit off due to gms % as it may be lower and the fact it is in prop blend with taurine, but GG V2 has more active glycerol per scoop than original GG