Alright here we go. This comparison is between the Z2, M8, and G3
Leaving the G3, for me Good choice. I can't take anything away from the G3 cause once the software is polished it will be great, however the quality of the software out the box for the Z2 was much better polished hands down. The Z2 has the lightest UI out the three. I actually think I like Sense the most. G3 is great, however buggy made the experience meh. The pop up windows, QSlide, and Quick View Case for G3 is what I miss.
Build wise, I'm still in love with the M8. It's just something about that build and how nice the Dot View Case compliments it's build. The curve and thing edges on the M8 and the G3 makes holding the phone a much better experience. Especially since the G3 is a little wider and as wide as the Z2. The Z2 is not hard to hold at all, but I feel a better grip with a thinner sides. That front and back glass though. I love it the most. I always liked that but now have to be extremely cautious to drops. The Z2 is not far from the build tree. The G3 is okay but the plastic fake brush metal back and -1 for me. Had it been a thin removable aluminum would had made it a better build contender.
Camera, oh man now I'm gonna take heat on this cause people swear the M8 sucks in camera. I don't believe that AT ALL. It's the best low light camera of the three. Does have a yellow tint, but the way it captures light in dark conditions was incredible at a engagement party I was at. Lack of OIS though is a -1. The Z2 does adjust good with flash support but it seems to have the most noise out the three. Now I haven't taken it to full testing to it's quality, but daylight hands down the best of the three. The G3 night pics sometimes came out blurring like it never focused good enough even with flash support. Weird could be software issues. Took great pics during day. All three did.
I'm glad I returned the G3. Software lag, noise static in speaker while charging, GPS/Compass issues, and mic sensitivity issues was just too much for me deal with. The screen just always seen dim even on the bright light and I honestly just think the 801 Snapdragon does not do the QHD justice as it overheats quite often due to pixel processing. It was a hard choice, but I think I made the right decision.
I bought a Sony OEM flip case, a couple of different bumper cases and magnetic dock case and magnetic charger adaptors.
As for the memory, this is where Sony dropped the ball with giving it 16MB. Really? I went and bought a SanDisk Extreme 64GB card. I really don't even need that much memory. I'm actually content with 16 but comfortable at 32 as I never use that kind of space on phone. That's what I have a tablet for. With 128 apps and moving my pics over to the SD card I have 11.57MB left so it's not terrible.
Oh another down side. I bought. I hate buying white phones, but I was compelled for this phone for some reason. Wish I didn't cause the white plastic and prone to dye bleed from pants. Why I need at least a bumper for it.
Speakers are by far the best on the M8. Hands down and nuff said.
I really don't see any benefit of that QHD screen. At least not now. The G3 however battery managed that GREAT. Didn't miss a beat and did not drain.
Really in all you can't go wrong with either three. The G3 will be better when they get the initial hiccups out from pushing the first batches out. I would wait a month honestly to let those move around and get them when the QC is better. Out there three, I love the Z2 the most only because it's a different build, but I keep admiring my M8. It's just that great to me.
This is unedited so excuse any crazy reading.