This is THE Christmas Album... the tracks are featured in loads of movies and TV, but never on any other Christmas CDs apart from this one. (Well, not to my knowledge... I'm sure someone will prove me wrong).
The deal is actually for Definitive Collection (Includes 'A Christmas Gift To You'): 2cd. There are 2 cds inside the box; one a greatest hits and one the Christmas cd. I have this already and the Christmas CD cover is exactly the same as if you bought it on its own (which, incidently, is the same price).
Spector, though a pop genius, is currently doing bird for murder.