Basically Brammo is trying to sell as many bikes as possible to as many people as possible...with only two models.
So the Enertia is more upright (will sell tons in Europe and Asia), the Empulse is more sports bike (will sell more in the States than worldwide). I know it is hard to see from USA eyes, but the Enertia is going to be far and away Brammo's biggest seller as Brammo sells to Hong Kong and Europe. Heck, when Brammo makes a scooter and sells that worldwide, it will outsell the Empulse. The Empulse is a great bike, but it is an American seller mostly. Some in Japan. A few worldwide too, and it is great for Brammo's marketing, just like racing is good for marketing, but the Empulse will not be Brammo's main selling bike worldwide.
The Empulse needs to appeal to the Suzuki 650 crowd, since it is the most popular sports bike, so it will have similar seating and riding position. The final version will not be as aggressive as the concept model in position...but the end user can mod it to be, just as the end user can mod it to be more upright.
Going for the most sales will dictate that the Empulse is still a sports bike, but not a track bike. So expect it to be slightly less crunched over like you see now. Expect a similar to Suzuki 650 position.
But if you order early and ask nice, I'm sure Brammo will sell you some pegs to get that crouched position if you like...maybe even the low handlebars.
But likely it will be sporty, but a bit mild...then you just mod it the way you like similar to if you bought a standard sport bike from Honda or Yamaha or Suzuki.
Gavin