I've owned both of them, and I really liked the G930 but I hated the G430. The sound quality (IMO) was better with the G930.
My G430 didn't last long, just several months until one of the ear pieces failed or something and I only received audio from 1 side, which sucked and I never used them again.
So I would avoid the G430 but the G930 is a very good headset with a great mic. The wireless is nice as well but be sure not to use the headset while it's charging too much, my battery died from doing that.
Edit: To me the G930 was also better constructed and more comfortable.