Another common feature which runs through all three handsets is the rear facing camera, which is rated at 5MP on each.
There's also the option to capture slow motion video and change the aspect ratio from 4:3 to 16:9 on the Moto G 4G and G - neither of which are available on the Moto E.
Round the front and the Moto E is lagging behind again with no front facing snapper on show.
The duo of Gs do rock front facing cameras, although they're only 1.3MP offerings so aren't exactly going to produce dazzling selfies.
With a smaller chassis and less demanding components it's no surprise the Moto E sports the smallest battery here with a non-removable 1980mAh power pack under the hood.
That said the battery inside the Moto G and G 4G isn't a that much bigger at 2070mAh, and it's also non-removable.
Motorola quotes up to 24 hours of life on a single charge with "mixed usage" for all three handsets - although that will vary depending on how much you like to hammer your phone.
As the name suggests the Motorola Moto G 4G comes with LTE capabilities allowing you to access faster network connections, if your tariff allows.
The original Moto G and Moto E both make do with 3G support, while all three boast Wi-Fi, Bluetooth 4.0 and GPS.
In terms of storage the G 4G and E have the upper hand as they have microSD slots hiding beneath the removable rear shell as well as 8GB of internal space. The Moto G is available in 8GB and 16GB variants, but with no expandable option.
The Moto E comes in cheapest here with a SIM-free price tag of £89, or £79 on PAYG.
The 8GB Moto G can be had for around £130 SIM-free, or if you fancy a PAYG deal it can be yours for around £100.
Topping the bill is the Moto G 4G at £149 off contract, but considering it's only a touch more than the original Moto G and has the benefits of 4G and a microSD slot it should be the G of choice if you can afford it.
If you can stretch the extra mile we'd recommend the Moto G 4G out of the three devices here, but if you're looking for a cheap second phone - perhaps one to take to a festival - the Moto E fits the bill nicely.
There are other options on the market if these Motos don't take your fancy with the excellent Nokia Lumia 520 offering up a Windows Phone experience.