TTX is a race version of the R. Ditch the CF bits, lights, mirrors, tail (wow that looks better).
Rotors look like the same, pads are probably race-specific. Tires are no doubt race tires. Wheels look like the same. Motor and battery are almost certainly the same, motor could be hopped up a little.
Onboard charger is probably gone. Rear sets are gone.
Weight is probably down 40-50 lbs.
I don't think the TTX will compete for the eSuperStock award - for starts they obviously need a race venue where they can compete before 25 have been sold. They will probably just straight up compete in the TTXGP, though they will probably be most competitive with the 7.5 kWh bikes.
Would like to see Empulse Rs compete in eSS as well.