I had a 2014 Brammo Empulse R which was replaced under warranty with a 2016 Victory Empulse TT.
Internally, some of the connectors have changed which makes getting parts a little easier. My first ride on the TT was 2 months after my last ride on the R so not quiet a back to back comparison. The torque spec on the TT is slightly lower and it is definitely not faster than the R, but I can't say it is any slower either. If there is an actual difference, it is subtle. I reliably got 80 miles of range on the R, and I reliably get 80 miles of range on the TT. This was a little less when the bike was new, and seemed to improve after the first oil change, so it could be the TT is just not fully broken in yet, or there might not be any actual difference in battery capacity. The narrower rear tire on the TT definitely affects the handling and took me a few days to get used to the quicker turn in, but lower stability of the TT. People notice and want to talk about the TT more, probably due to the name recognition of Victory over Brammo, or maybe just because the new one is Red. The dash is physically the same but the green lights on top are used differently, the range estimator is substantially improved on the TT. I still use the battery charge % as I had gotten used to the range estimator being almost worthless on the R. Tail lights on the TT are not as bright from wider viewing angles as on the R,
the TT may have LEDs instead of the incandescent found on the R
. The fully adjustable forks that came with the R are an upgrade on the TT, the TT comes with the same forks you get on the non R Brammo. Rear suspension is the same on the TT and R. The TT comes with right angle valve stems
stock. The batteries for the TT come as 2 different size units instead of the 7 same size ones on the R. The bolts to adjust the drive chain are a slightly different style on the TT than the R. The stickers say Victory instead of Brammo.
For the most part, they are the same bike, I have not seen a 10% increase in range, but that could change as things get worn in. It would come down to price and available support as the differences between the bikes are pretty subtle except the narrower rear tire on the TT.