Inside the HTC One M8 GPE are the same fire-breathing components powering the HTC One M8. Driving the phone's squeaky clean Android software is a 2.3GHz quad-core Snapdragon 801 processor. Freshly minted by chip-maker Qualcomm, it's the same slice of silicon used by an elite group of flagship phones for 2014 including the Galaxy S5 and Sony Xperia Z2. The Galaxy S5 relies on a 2.5GHz processor, but unless you're part machine I doubt you'll notice a difference.
Backing up the processor is a respectable 2GB of RAM but unlike the standard One M8 which ships with either 16GB or 32GB of internal storage, the Google sells the M8 GPE in one 32GB flavor. One critical improvement both handsets share though is an SD Card slot for additional storage space. I can't stress how much of a big boon this is particularly to those (like myself) who tend to load their gadgets up with music and movies. Also take note that the One M8 requires a nano-sized SIM card whereas the first One used larger micro-SIMs, so if you plan to upgrade you'll have to spring for a new card (or adapter).
Perhaps the wildest addition HTC brought to the One M8 is its dual-lens main camera, and the One M8 Google Play Edition relies on the same imaging hardware. As with a standard smartphone, the primary lens captures light to be read by the camera sensor. A second smaller lens on the back of the One M8 GPE also keeps an eye out for the relative distance of subjects and other objects--simply put it acts as a depth sensor.
And don't think because the M8 GPE lacks HTC's Sense UI, means the phone can't make use of its unique optical setup. HTC and Google have collaborated closely here to make sure many of the post-editing tricks the One M8 can tackle reside in the One M8 GPE's toolbelt as well. For instance, after you snap photos you can refocus them via HTC's Photo Edit app (installed) to blur either the background or foreground for that artful Lytro effect.
The revamped Google Camera application, the One M8 GPE's default imaging software, now features a "Lens Blur" shooting mode too that simulates this shallow depth of field. Along with this the app allows you to apply plenty of interesting filters, and manually tweak brightness, contrast, and sharpness. Modes for HDR, panorama, and "Photo Sphere" for capturing a 3D view are built in as well.
You can't choose the image size which honestly is a moot point since the One M8 GPE relies on the same 4MP "Ultrapixel" sensor which both the old HTC One and standard One M8 ship with. Due to this relatively low resolution, the pictures I took fine on the M8 GPE's small screen but become noticeably grainy and pixelated when blown up or zoomed in tightly.
Since it's identically equipped with the same powerful mobile parts as its HTC software doppelganger, I expected the One M8 Google Play Edition to turn in similarly swift performance. Astonishingly, this was not the case. While the handset's high Quadrant score of 19,206 is nothing to sneeze at, the HTC-branded One M8 running Sense 6 over Android notched a jaw-dropping 24,593 -- the highest result I've yet seen anywhere.
This includes the Galaxy S5 (23,707) Note 3 (23,048), LG G2 (19,050), and of course the 2013 HTC One (11,381). The highest Linpack (multi-thread) showing I could squeeze out of the One M8 GPE was 773.7 MFLOPs which is lower than that of the One M8's (878.5 MFLOPs) as well.
Of course when I used the One M8 GPE in the real world, the phone felt every bit as fast as the standard Sense 6 HTC One M8. Websites, menus, and apps opened just as quickly to my eyes -- in other words lightning quick.
I tested the unlocked HTC One M8 GPE on T-Mobile's GSM network in New York and my test calls exhibited rock-solid call quality in line with what I've experienced with the AT&T-branded model of the One M8 I tested before it. Callers described by voice as clear, rich, and easy to understand.
They also didn't hear any artifacts such as background hiss, static, or clipping which can plague lesser cell phones. That said, people told me they could definitely detect I spoke to them from a wireless connection, given away by the slight robotic compression cellular audio tends to exhibit.
Voices came through the earpiece with plenty of volume and richness. Oddly enough, despite the M8's powerful stereo speakers calls conducted via the speakerphone were not extremely loud.
One of the most compelling aspects of the HTC One M8 Google Play Edition is its unlocked SIM Card status. Essentially the device allows you to drop in any compatible SIM Card and is flexible enough to support both T-Mobile's and AT&T's flavor of 4G LTE data.
To confirm this I managed to connect the One M8 GPE to T-Mobile's 4G LTE network in New York, where the phone turned in acceptably swift data speeds. I measured average download throughput at a quick 15.6Mbps. The M8 GPE was also able to upload data at a respectable average of 10.9Mbps.
Equipped with a 2,600mAh battery, the HTC One M8 GPE isn't as robustly configured power-wise as the big Galaxy Note 3 (3,200mAh), Motorola Droid Maxx (3,500mAh), or even Galaxy S5 (2,800mAh).
That said, the M8's battery is a tad larger in capacity compared with the previous One (2,300mAh). The phone survived for 11 hours and 23 minutes on the official CNET Labs video battery drain benchmark. Interestingly this result is longer than the stock One M8 which couldn't break the 10 hours mark on the same test (9 hours, 52 minutes). Both version of the M8, however, outlasted what the first HTC One delivered on the same test (9 hours, 37 minutes).
For all HTC's attempts to add spit and polish to its current One M8 flagship, if push comes to shove I'd ultimately choose pure Android over Sense. That said, with Sense 6.0 the decision to place stock Android 4.4 KitKat on a pedestal is now the toughest it's ever been for me. HTC's latest whack at its smartphone interface is its most advanced and intuitive yet.
For many, then, the choice will come down to price. Both the standard, unlocked One M8 (running Sense 6.0) and One M8 Google Play Edition cost an identical and exorbitant $699. For US consumers who are used to subsidized contract pricing (or T-Mobile-style installment plans), that will feel incredibly expensive. Case in point, Verizon and AT&T offer the standard HTC One M8 for $199 -- though that price does, of course, require signing a 2-year service contract. T-Mobile sells the One M8 $0 dollars down but you're on the hook for 24 monthly payments of $26.50. You can also snap up the similarly equipped Nexus 5 for almost half the price ($399, unlocked).
Looking a little closer, it's clear that the One M8 GPE offers more value than you might expect. First, its metal design is utterly gorgeous. Second, as the only other phone outside of the Nexus 5 to serve up the powerful and attractive Google Now Launcher interface, the M8 GPE is truly a uniquely compelling Android product. Throw in the SD card expansion slot (something all Nexus phones lack) no to mention an intriguing depth-sensing camera and this gadget suddenly becomes very alluring indeed.