I have a Samsung Gnex which is obviously not something I can compare. The main reason I'm leaning towards the S5 at the moment is the fact that I can do wireless tethering on it for the Verizon unlimited data plan (which is blocked by VZN unless you pay their $30/mo). The water/dust resistance is something that's a mid level factor for me playing beach vball all the time also. Having played with both phones, absolutely the G3 feels better in hand even though it's larger. Design wise, the G3 wins it for me. Functionality such as FoxFi allowing me wireless tether and water resistance the S5 takes it for me. But a tough call.