These phones are very similar in overall size. The One Plus 3T is just two percent taller than the G5 Plus.
The Moto G5 Plus maxes out at 31-percent thicker, but it has a rounded back and that measurement only includes its thickest point.
The 3T weighs three grams more.
This is the first Moto G flagship with an aluminum back panel. It looks higher-end than previous generations, but there is still some plastic in its build. OnePlus opts for all-over aluminum.
Both phones are available in metallic gray and gold color variants.
The 5.5-inch display on the OnePlus 3T packs in 10 percent more area overall.
Both displays are 1,920 x 1,080 pixels, which means a slight pixel density advantage on the smaller G5 Plus.
Motorola and OnePlus fall on opposite sides of the IPS/AMOLED fence.
The OnePlus 3T has a zippier chip, but the Snapdragon 625 in the G5 Plus should still be capable.
The OnePlus 3T comes with an industry-leading amount of RAM, while the G5 Plus is available with either 2 GB or 4 GB. However, keep in mind that additional RAM in a smartphone doesn't always mean faster operation.
The G5's built-in 32 GB and 64 GB storage options are half the capacity of the OnePlus 3T's.
If you're really concerned about storage, however, the G5 Plus has you covered. It is expandable via microSD to 128 GB.
The 3T's battery is a little more capacious, but battery size isn't the only indicator of overall battery life.
The G5 Plus sticks with the older microUSB standard, but the 3T has upgraded to a USB Type C charging port.
Both makers make claims of fast charging, but they have different standards. Motorola says the G5 Plus gets up to 6 hours of power in 15 minutes of charging. OnePlus' claim is that its Dash Charge affords "all day power" in 30 minutes.
OnePlus wins the megapixel battle, especially on the front camera. It takes 16 MP selfies.
Camera aperture (rear)
The Moto G5 has a larger aperture, one indication of good low-light shooting.
Optical image stabilization
Only the 3T contains optical image stabilization, blur-fighting technology that compensates for shaky hands.
Unlike many of the flagships that have hit the market over the last year, neither one of these has meaningful water resistance ratings.
The Moto G5 Plus works on all major US networks, but the OnePlus 3T is not CDMA compatible. That means no Verizon, Sprint or US Cellular.
Both phones have a fingerprint sensor below the display.
Near-field communication (NFC) is the requisite technology for making mobile payments directly from your phone. The OnePlus 3T is NFC-equipped, but not the G5 Plus.
Both phones run Android Nougat with few additions or modifications.
The OnePlus 3T was released last November, but the G5 Plus starts hitting shelves next month.
Starting price (full retail)
The OnePlus 3T is over US$200 more right off the bat, but then again, we think it is competitive with premium phones that cost even more. Still, its lack of CDMA compatibility could be an automatic deal breaker to many US buyers.
On the other hand, the Moto G5 Plus is a well-equipped phone for only $229. Unlike the OnePlus 3T, it is available through US carriers, so it may be easier to purchase on a favorable payment plan as well.