In the Motorola press materials, the Moto G7 Plus is advertised as having 'unshakable image quality'. That goes to say that the Plus's main camera has optical image stabilization and it's a feature you won't find on any of the other G7s. Not only is it stabilized, the lens is also pretty bright with its f/1.7 aperture. The 16 million or so pixels are reasonably large too and the pixel size of 1.22µm reveals a 1/2.6" sensor. There's an extra 5MP module for depth detection too - the usual stuff.
The other three phones all have different camera setups. The Moto G7, for one, has marginally bigger 1.25µm pixels than the Plus's, but fewer of them - 12MP on a 1/2.9" sensor. Its f/1.8 aperture lens isn't stabilized, however - only the Plus get OIS. A 5MP sidekick is to be found on the vanilla G7 as well, so not all is lost.
Meanwhile, the Moto G7 Power and the G7 Play only have a single camera each - on their backs, that is. The Power's 12MP sensor with 1.25µm pixels is placed behind a slightly dimmer f/2.0 lens. The Play bumps the resolution up to 13MP, but the individual photosites are smaller at 1.12µm and so is the sensor (1/3.06").
As for selfies, the Moro G7 Plus stands out from its siblings thanks to its 12MP front-facing camera - the other three only have 8MP units. And once more, as with the display resolution and GPU pairing, the vanilla Moto G7 appears to have gotten the worst of both worlds - it's neither equipped with the high-res 12MP sensor of the G7 Plus, nor does it have a flash like the G7 Play. Staying true to its name, the G7 Play has a front-facing flash, while the G7 Power has a similarly wide notch, but no flash - probably it clashes with the longevity aspirations of the phone.
Since we had the Moto G7 Plus for a few hours to play with, we took it for a stroll to try out its camera. Okay, it wasn't really a stroll and the weather wasn't cooperating, but it is what it is.
What was once a single, decently specced and very affordable Moto G has morphed into a whole lineup of Moto G7s some 5+ years later. This latest generation caters to a wide array of users in the low-to-mid... midrange with prices varying from €150 to €300 and hardware to reflect those differences.
We could only find out so much about the top-of-the-line Moto G7 Plus during the brief time we got to spend with it, but it's looking like a solid well-rounded offering. Going by the numbers, the Moto G7 proper should offer largely the same user experience minus a few MP and fps at a slighly lower price. The Moto G7 Power is all about battery life, while the G7 Play is bridging the gap between the G series and the entry-level Moto Es of this world. Something for everyone.