So what it's tier 2 bronze? Gold means better PSU efficiency!
that EVGA you call shit G2 is OEM super flower and GS is OEM Seasonic. Antec are mostly OEM Enhance/Seasonic.
Evga G2/S2 as well as that seasonic i recommend has same good capacitors. if you're going for 980Ti a proper 550W psu is also enough.
R9 380 is not much better than GTX 960 - starting with drivers, also - TDP.