It's similar to the Miramax version, because the Miramax version was made from it, but the Thief and Phido don't talk and the witch and war machine scenes are included, so you will hear more of the original sound I suppose. Donald Pleasance's voice as Phido and Joan Sims as the witch for example, and a lot of sound effects. I went to the "Princess" soundtrack fairly often in my edit. In all versions Tony Quayle can be heard as King Nod makes his speech to the peasants. And I think, although it's highly unlikely, that Hilary Pritchard can be heard as Yumyum screams "Tack" - I am almost certainly wrong on this but I like to believe it anyway.
Checking the IMDB page - lol, every time I load this page I see my own review of the film from years ago. "Tygerbug," from Monroe CT.