Due to my computer limitations and being new. I bought a Reallfight {full version, not lite} G2 off Ebay. Is there a big difference between G2 and G3? I didn't want G3 since my computer would require more software.

There will be a difference of course, but both will still serve the same purpose to help you practice your skills.

i agree with jigeye, i've flown g2, but own g3. The g3 simulator is much better to practice 3d with airplanes and helis. graphics are much better. but they both help alot.