The difference between the two is 13.
Some measure HP at the Crank, and others at the rear wheel.
You can do several performance up grades, all it just takes money.
One very common thing is to change out the stock exhaust to a full unrestricted aftermarket exhaust. Those are not always legal for street use, some slip-ons can help increase the HP and you can play around with mapping/tuning.
For me, I have managed to rack up plenty of speeding violations, with my Stripel right out of the box, so.............
You can't have mountains without valleys.
2009 Triumph Street Triple R 25,200 miles
2006 Triumph Sprint St. 42,900 miles