I can't tell you a thing about the G&G but I can tell you a lot about the ICS model.
My friend has this gun, and I just got done doing some repairs on it. While repairing it, I've had a good opportunity to really see the guts of this gun, and what I saw I was generally impressed with. The ROF on this gun is incredibly high with a large 8.4v battery, and firepower is very accurate.
After working on this gun, I would feel very safe buying it. If I were in the market for an AK74, I'd be reluctant to go anywhere else, just because of that first hand experience. (Meaning, I wouldn't even take the chance of trying out another model unless I could find a lot of positive feedback and some nice reviews).
As I've said, the gun is great. I can't think of one negative thing to think of in the gun, except maybe the tappet plate that I had to replace. (But my friends are automatic lovers, and let's say a lot of unnecessary sprays have come from this gun) So it may not of been the gun at fault, but rather, how it was treated.
As for the G&G... I don't know how it might compare side by side. Having just looked at the Airsoft GI tables for comparison of some of their guns.... I'm not so sure you'd want to look at those for your decision. The models that are voted poorly are generally the more expensive models, (CA, ICS) and in both cases, the durability I have seen from both companies models firsthand is excellent. I'm not so sure how they grade their products, especially giving this such a low grade, so I'd recommend you don't look into that too much. (And especially since the ECHO1, G&G, and TSD guns that are getting all the good ratings, are also banners that you can click on, on their main page. Whereas companies that produce good guns in my opinion, are left out.)
Now a lot of people are giving G&G high praise all of a sudden, but that doesn't make the competition any less good than it was before these G&G's started showing up. Basically, I'd just like to leave you at that: I'd have no problem buying a reliable system such as that in the ICS, but with this other brand I'd not be so sure.
I DID do a little research from the guys at the Western New York Airsoft League (WNYAL for short), and from what I've seen it's a 50-50 shot between CA and ICS. Sadly, there weren't any particular reasons to sway someone one way or the other, so I can't help you there, but I encourage you to research this heavily. And be sure you don't just go to one biased source (like me, CA all the way dude, ahem) but you broaden your perspective and see what a lot of people think of it, and hopefully that can help you make your decision.
Bioniclebert is a moderator.