Brammo's certainly specified expensive forks, shocks, brakes, wheels. I would hope it would outhandle the SV650.
The SV650 will definitely be faster on a drag strip. It may even be faster on a track, it has about 20% more power than the Empulse and the same weight.
In real world riding, the Empulse will probably feel faster. My GS500 has a 11k rpm redline like the SV650, I typically rode it around 4-5k rpm. Anytime I wanted big power I had to shift once, maybe twice before I could get going.
On an electric bike the powerband should be much broader. So as long as you have headroom left in your chosen gear, to make big power you twist your wrist and go.
In the 30-65 mph range, the Zero feels almost as fast as the GS500, despite being significantly down on power (maybe 30-40% lower).