Phalaenopsis Cassandra is a very old hybrid between equestris and stuartiana. It was registered back in 1896.
Mottled leaves sure look different, although I don't find the pattern very atttractive(comparing to the mottled leaves of some paphs for example), to me looks like it was sprayed with something and then wasn't properly cleaned. I really like the blooms though.
My Cassandra is a mature plant - there is a trace of an old spike.
According to the web, flowers should be fragrant.