Not a good angle to tell...but my first instinct was...HAF sole (or as Razor say, 'double to single'). I don't like them soles myself as it upsets the symmetry of a nice shoe.
Between Vass &GG, I wear both and I think it depends on the models you are comparing. For oxford designs, I think it's about the same.
Although I feel GG is a touch ahead in terms of little refinements that add up to larger than the sum of the parts.
Vass has very nice lasts while in GG I only like MH71 and KN14.
Personal opinion, yours may vary.