I believe our 110 GTTDI is listed as a highline - has the cloth sport seats, not Recaros - The bolsters and sides are much much different, even though they look like a recaro style seat.
It's probably something odd like adding in all the sports extra type bits, it makes it a highline even though they're not optional extras on a GTTDI.
Dunno. Could be a fair swap, guess it all depends on the condition of yours and what you have done to it, to make it a fair swap.