I never really used a G4 (upgraded from a Nexus 4 so I was over due). I just find it interesting that no one mentioned USB 3.0, Fast Charging etc. I know they both have replaceable batteries but I'm sure the G5 can do it faster. How a bout the front facing 8 Meg selfie cam does the G4 have that too? How does the speaker sound I agree with some reviews it may be the best mono speaker on any flagship phone this year. BTW how much free stuff did you get when you bought the G4 just asking? An extra battery and a 360 CAM included with my purchase of a phone, I couldn't pass up that deal.
Ultimately, I'm happy with my purchase! If I never get a module "GREAT", if I do get one "AWESOME" either way I am happy with the direction LG went with this phone now and in the future.
You should be happy with whatever phone you choose.
I'm not sure you need someone to convince you or you wanted the debate.