PF "Obscured by Clouds":how good is Japanese lp?

In my local shop i see 2 used near mint versions of Pink Floyd's "Obscured by Clouds":one is US pressing for $10 and the other one is Japanese for $40.How big is the sound gap between these two to justify shelling out $40 for it.Thanks for your comments.
Opps! Forgot to mention just one more thing... stay away from both the EMI US and British UK copies as they are later pressings, mid 70's and beyond! Cheers!
Thanks a lot.
The Japanese release is black label Odeon but US release says Capitol Records on it.
Overhang, fourty for the Odeon is a good price if it is clean and M-. It should have silver lettering on Black background. If you are willing to part with the cash, I think you will find this to be a very nice pressing. Capitol US is obviously on of a zillion later pressings (no way a first) and I would contend that it is worse than the EMI which isn't anything to write home about. Happy hunting.