Previous models had no grip to speak of and the M3's is pretty substantial.
Many competitors have introduced zoom switches on their interchangeable-lens cameras to go with power zoom lenses. Canon has yet to introduce a power zoom STM lens, so no zoom switch required.
Like its enthusiast-compact cameras, the M3 has an exposure compensation dial on top.
To go with the big grip up front, the M3 has a nice thumb grip in the back.
The M3 gets Wi-Fi and NFC.
A tiltling touchscreen that can flip up for selfies is new for the M3.