Hi there, just surfing the forum and thought that I might help here.
EICAS- Engine indicating and Crew aleart System, is only available to the 400. It use is for the monitoring of all engine and airframe systems and informing either ground crew or flight crew to the current status of the aircrafts systems.
As for the rest that is has been mentioned it is all spot on. There are other differences with certain systems but you could be here all day typing.
I hope it has helped.
Cheers