Will you be matching corners in your slowmo comparison (so if one falls behind you'll make sure they both start at the same point next corner)? Would highlight the gains at each corner. And obviously focus on braking/throttle differences and noting corner/exit speeds would by great. Other than that can't really think of anything specific, sure you'll do a good job anyway.
EDIT: Oh and if RA gets a better exit see how long it takes for their speeds to match again at the same point on the next straight.