Short answer: It's more than a tune between the Trail 1000 and the Sport 1000R. According the Mr. RPM the 1000R engine has different heads, cams and compression.
Long answer:
My performance mods and seat of the pants results. 1st changed the clutches to STM primary and secondary. OMG believe the hype! Shocked how much more usable power is going to the ground, better response etc.. Next full HMF exhaust and Dynojet tuner. This combo really woke up the engine. This might be enough for you. The drivetrain performance was outperforming the shocks. If that's not enough (it's not for me) Next I installed Elka Stage 5 shocks. Now the shocks outperform the powertrain. My next step will be dropping off the machine at MR. RPM for big bore kit, heads, intake and cams. They'll tune the engine and clutches as well. That's probably the end of my performance mods. If that's still not enough for you, there are a couple of guys on the Trail/Sport Facebook group running nitros and building turbos.