For me the questions are...other than the obviously of speed and range and weight and such....
One: Will this be available before, after or the same time as the Plus?
I could see getting one of these as a commuter instead of the Plus if the speed and range are potentially similar (i love a shifty bike...i like that I could hit the dirt from time to time).
To differentiate the models I think Brammo should do this if possible: Empulse: Pure street. pure speed. Enertia is pure city, pure commuter. Now the Engage is a bit of a hybrid...can do city, can do dirt. So to make the Enertia a bit more attractive: BENCH SEAT for 2. City folk like to occasionally have two on a bike more than a high speed ride or a jumping dirt ride.
A two person Enertia would trump a single rider dual sport for me. But if both are single person and both come out at the same time, I could see going dual...maybe.