Well, it ("G") is the prefix for the rifles made in the New Haven location before that iteration of Winchester ended manufacturing them. That was about 2006 IIRC. After about 2 years FN began manufacturing Model 70s with the Winchester name in South Carolina. The first few years the guns were made entirely there, then I think they have been assembled in Portugal but still manufactured in the US. I'm not sure of the ownership umbrella, but essentially the Browning products and Winchester are part of the same group. The rifles made by FN are different in a couple of respects. They have an enclosed trigger similar, but not identical, to the trigger in the Browning X Bolt rifles. That contrasts with the traditional Model 70 triggers, a long respected design, that persisted through the end of the New Haven era. They have once piece bottom metal, where earlier M70s always had separate trigger guards and floor plates. I noticed the FN rifles have a cone breech like the pre-64 rifles. They have also added a bolt guide of sorts behind the left recoil lug to make the operate a little more smoothly. The left side of the bolt shroud has a small flange that blocks any escaped gas a little better.
Personally, I have owned a number of Pre 64 70s and several New Haven guns, and now have my first FN made rifle. I have to say that the new rifle is the smoothest operating and best finished of the bunch. I haven't shot it yet but they are generally said to be as accurate as any M70s that have been made. The stock is better fitted to the barreled action than the New Haven guns, especially the later ones. I was not too enthused about the change in the trigger design. As a closed design, it might capture or retain debris more readily than the original. The pull was ok, but too heavy, and although adjustable for weight and over travel, it could not be reduced below about 4.5 pounds. I bought a spring kit for it, installed it, and very carefully polished the surfaces of the trigger parts with 1200 grit sandpaper. I used a home made jig setup to make sure all angles were square. Now, it's about as good as any trigger on any hunting rifle I've ever owned, including the old M70s and those with aftermarket triggers. The spring kit was $13. It may pick up more debris than the old M70, I don't know; but, it would be no more prone to do so than the custom triggers in many custom Mauser rifles. No one complains about those. In all, assuming the rifle proves to have good accuracy, I would say it's the best of them. That's my take.
