Details of Beatles Vinyl Master Recording BOX Set?


I just inherited a complete box set of the Beatles Master Recording LP set. I see them on eBay fairly often for which they sell at $1,000+. How do these differ from any other boxed LP set?

Clearly the Master Recordings are superior, or at least that is how I understand it, but what makes it better?
Deeper grooves, better vinyl, better recordings? What is it?

Thanks,
Dan
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Its supposed to be better (virgin) vinyl, heavier vinyl, half speed mastering, scarcity, and of course, don't forget fleabay mania. The quality of the mastering varied from LP to LP in general in the Mobile Fidelity series in general. I have not heard the Beatles Mo Fis to comment on the sound of that actual set.
What is "different" with a Mobil Fidelity Sound Labs Half Speed mastered LP pressing, or "MFSL" is:
-- the original master tape, not a copy or duplicate, is used to master the pressing.
-- the tape is run on high quality equipment at half-speed, which gives you the following: greater dynamic range, lower distortion esp. on peaks, a little more detail and sparkle in the treble, more detailed soundscape.
-- LP is then pressed on "virgin" japanese vinyl, a little heavier weight (poss. 140-160 grams)this gives you a very quiet, low noise background.
-- pressing cycle is usually longer to get a better print, also fewer pressings per stamper - limited editions.
-- LP is packaged in heavier cardboard album with rice paper sleeve and loose plastic wrap to avoid warpage.

Do they sound better? In many cases my opinion is yes, but it varies from title to title, who was working the mastering and equalization of said title. Some folks don't like the Beatles MFSL versions... I don't have them so I can't say...
I have MFSL vinyl recordings of Sgt. Pepper and Abbey Road. Xiekitchen describes them well.

Yes, they sound better in general than standard issue vinyl. Do they sound better than the CD versions? Maybe. Both sound quite good but different. I would describe the sound as very dynamic yet smooth, clear and involving.
Lets just hope the rumor of the entire Beatles catalog being remastered at a high bit rate are true and that it gets releases in vinyl.
Its amazing to me that the Beatles catalog has gone through few relatively few re-masterings on CD.

Many lesser acts have had their catalogs re-mastered umpteen times already.

I suspect the audio buff market that is the natural target for remastered works is a pittance compared to the overall market for Beatles material.

Even in the BEatles case, more re-mastering is bound to happen.

Beatle fans/audophiles take note:

I've noticed the "Beatles-a-rama" internet radio station (which I think is just superb in every way) generally plays the rarer (and very crude) U.S. stereo versions of the older Beatles tunes rather than the mono-versions that have been the mainstay of the Beatles CD catalog for the most part.