^^There's definitely a difference with the GH bag's weight. But it doesn't bother me. I think mainly because I've gotten used to MJ bags which are HEAVY compared to B-bags. Also, I think since I got a Brief with GH instead of a City with GH, I don't think about the weight difference as much.
The GH doesn't make the bag as heavy as a MJ bag or a Paddy, but you definitely notice the difference--hope that helps!