your kin of right, the first are non-sport leather seats, as would have come in a non GT GTI golf with leather spec. The second are the standard GTI GT or R32 seats, they come in cloth, leather, half leather (ED30) and pirelli spec, the third are the Recaro buckets they are an option on GTi and R32 they aren't a standard option and are very rare, more so in cloth than leather.