Well I will list the factors that REALLY APPLY IN GAME of the weapon.
1. Recoil
2. Rate of Fire
3. Damage
4. Accuracy
So on the galil, the ratings are as followed going by the list above.
1. High Recoil
2. Low RoF (Rate of Fire)
3. High Damage
4. High accuracy (This accuracy is only for single to burst shots, full length sprays will get you know where).
And on the G3A3, the ratings are as followed going by the list above.
1. Medium-High Recoil
2. High RoF (Rate of Fire)
3. Medium-High Damage
4. High Accuracy (The accuracy on this gun is phenomenal, though you might want to learn how to maneuver your mouse while moving/jumping/crouching).
So apparently, if you're going against a quick sprayer like an m4, fa-mas, etc... You should get a G3A3, it will be able to knock out the sprayer in varying around 3 shots, which is about a second + split second? Including far range distances.
But the galil, is just a gun that does more damage. Like 4 bullets will kill someone at far distance. And that's assuming you will hit all bullets from the burst shot on them. Once the burst shot dissipates (first 3-4 bullets shot), the recoil will kick in and you are left like a sitting duck missing every bullet after. And that's when the low RoF will be your non- benefactor.
Summary: Each gun has its pros and cons, and each gun has its own role depending on what and how you play with it. Overall, get your self the G3A3. Because if you're not one with patience to master a heavy recoil weapon such as the Galil, then go spend an extra 2k SP on the G3A3.
I for one hand, don't like neither of these guns. I have them both also, and I say, they weren't worth the G-Coins to me. Ak-74tops off these 2 guns from a mile away...