[T-Mobile LG G3] Dan37tz:
So after using the G3 for about a week, I picked up an S5 also to compare it to. My G3 will be replacing my HTC One M8.

Performance initially was disappointing, seemed to microstutter everywhere which gives a perception of a laggy device. At first I was very upset but after putting all 3 devices side by side and running and opening apps ect., the G3 is just as quick, if not quicker then the S5 and M8 when opening and switching apps, the key difference here are in the animations.

The S5 and M8 are very consistent with smooth app opening, closing and switching animations. Always seems to run fluid 90-100 percent of the time, the G3 struggles to render them smoothly consistently. The animation stutters, stutters, then closes and vise versa when it opens on many occasions. Drove me insane! In-app performance are pretty much identical between the 3 with scrolling a tiny bit smoother on the S5 and M8.

Screen quality, I would have to give the win to the HTC M8 out of the box, because of the weird over sharpening high contrast setting LG decided to use, text on the G3 looks lower resolution than the HTC as a direct result. Colors on the G3 also looks a little washed out compared to the M8 and S5 out of the box, BUT...you can change the contrast ratio on the G3 in the accessibility menu and make the colors pop to your hearts desire. Very nice.. M8 also has better black levels than G3.

Don't get me started with the S5's screen, I can't believe one report actually gave it the "best display ever tested" title. Looks like garbage compared to the G3 and M8. No matter what setting I chose, adapt display, professional, cinema ect, it was way over saturated to the point where the colors look almost neon like. Everything looks lower resolution also, I blame TouchJizz mostly because once you switch to a different launcher like Nova, the icons look sharper but still not on par with the M8 or G3. The S5's display looks "Okay" once you crank the brightness past 75 percent, anything under that and the screen just looks terrible. Maybe my eyes have gotten accustomed to IPS LCD, I can't see myself going back to AMOLED. If this is the best that AMOLED can offer at the moment.. NO THANKS!

Camera, lets make this simple. The S5 takes the best pictures overall. It also records the best video with options for full 60fps in 1080p. G3 is a close second but the colors just doesn't seem to look as nice as the S5's, clarity and details are similar but the S5 exposes the picture better. HDR is also better on the S5. M8 takes very nice close up and macro shots but sucks big time when you try and take a scenery shot I really haven't tried much night time photography so I can't comment on that.

Battery life, S5 and G3 seems to be neck and neck lasting my entire work day with heavy use, the M8 trails behind and needs to be plugged in for my drive home.

Design and in hand usage. This is very subjective, I find the S5 the most comfortable to hold but it's also the most godawful looking. There's no denying it, the S5 is one ugly phone compared to the other two. Looks and feels terribly cheap, huge bezels giving the phone a very dated look. M8 looks great, build quality is nice but it's also very uncomfortable to use. It's slippery, the edges are sharp and it's just a pain (literally) to hold on to. It just doesn't give you a reassuring feel when using it especially over any hard surface. It also feels a lot heavier. The G3 is the perfect blend between the two, it looks beautiful, perfectly weighted, comfortable to hold, feels solid in the hand and has just enough "grip". Hands down I think it looks the best, just gorgeous.

Audio, as you guessed it the HTC One M8 tops it here, it sounds great with the Boom sound external speakers and with headphones plugged in. Bluetooth audio streaming also sounds very clean with the M8, the G3 matches the M8 in headphone audio output and bluetooth streaming quality but obviously gets smoked when it comes to external speaker quality. G3 still sounds very loud and pretty full for having only one rear firing mono speaker. The S5 is the worst performer here, headphone audio performance is just dismal compared to the other two even after playing with the built-in EQ. Bluetooth audio streaming on the S5 is also weak, audio tracks sound very degraded over bluetooth. Another weird issue I had with the S5 was it didn't play nicely with my Lexus Mark Levinson system, I had to crank the volume to twice the level to get the same output as the M8 and G3. (Yes, the bluetooth output volume was set to max on the S5) The S5's external speaker is also the tinniest, almost painful to listen to at higher volumes. It has piercing highs with no mids or lows. I guess when you make the phone IP67, sacrifices must be made.

Conclusion, as you can see all the phones have their pros and cons but overall I think we all made the right decision with the G3. I've been on a search for the "perfect" phone since I can remember, for me at the moment, the G3 is the closest one yet. I'm sure performance will improve with updates so I am excited for the G3's future. I'm also glad I gave it a second chance, I literally had it all boxed up with the return label slapped on it back to T-Mobile. Looks like it will be sticking with me for a little bit longer. ;)