38G is a different beast to me then the J and L. Granted I fly the 38G almost exclusively, but when I do hop in a J or L it just feels heavier to me.
But then again I'm a reformed Spit pilot and the 38G is a real turn fighter. Get under 50 fuel in the G and it will do just fine against just about anything.
But as others mention, it's not the same in the vertical as the other 2 38s and the guys like AKAK, Murdr, Delirium, Raptor etc use that very well.
I've corrupted Soulyss a little bit with the G but he's a far better stick then I am and can eat folks alive in it.