Bob, thanks for your reply, I'll contact McBean's Orchids as you suggest.

Mike
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"Bob Hobden" wrote

As you probably know one is a species and the other a hybrid, if the
latter was a variety of P.amabilis it would be written so. (e.g.
P.amabilis "Taisuco Snow") There are a great many "Taisuco" Phals about,
obviously the breeders name.
I think for a definitive answer you need to contact experts like McBeans
Orchids ...

http://www.mcbeansorchids.co.uk/

Regards
Bob.

ps. note spelling of Taisuco.