Some of the changes in the 2017 ERA 70M compared to the 70C:
Truma Combi heating and hot water system
NovaCool 12V Compressor fridge (can run on solar for several days)
Continuous dimmable race track ceiling lighting
Firefly multiplex wiring with single touch controls for multiple functions
MAXXAIR premium vent system
New fiberglass bath surround (no door to the rear as in the 70C)
Zamp 100 watt solar system
High gloss cabinetry
Under cabinet accent lighting
Redesigned street-side storage area
Large optional 9” Infotainment Display
Optional collision avoidance
Powered Murphy bed with memory foam top and Froli sleep system (can leave bedding on when folded up)
There may be a few others that I missed...here's a 5 min video:
https://youtu.be/Vv0BrtkAFDc