There are a total of three CDs in two versions, all released in 1992 in advance of "Best I".
The U.S. version was a digipak with 8 tracks. It's very common.
The U.K. version was a two-part CD single.
IIRC disc one was the original single: "This Charming Man", "Accept Yourself", "Jeane", and "Wonderful Woman". Its plastic CD case was a flip-case designed to hold two CDs.
Disc two was all 7 released versions of the song, as on the U.S. digipak CD. (The "London" mix was the actual "official" single version.) This CD was supposedly available for one week only, and featured the Jean Marais picture sleeve with no text on the front except for a small number stamped on it to indicate its uniqueness.
Also, WEA released another limited edition gem: a 7" vinyl version of the RT 136 single with a nearly identical sleeve to the original (the only difference being the record company fine print, natch).
As a set the singles were really stunning, and it was satisfying to have all the versions, finally, as the original RT vinyl singles were hard to find and too expensive. Brett Anderson made "This Charming Man" his Single Of The Decade (not just Week!) in the NME.
Warners also released a special "How Soon Is Now?" CD single, in two parts, as well as one for "There Is A Light That Never Goes Out". Each contained rare vinyl tracks that hadn't yet appeared on CD, the best of which was the live version of "Handsome Devil" from the original "Hand In Glove" 7" and the tracks from the Sandie Shaw single. The sleeves were gorgeous, too. I don't think Morrissey designed them, as they didn't appear in "Peepholism", but they were excellent fakes.
As records I found "Best I" and "Best II" totally useless, but the three singles they put out to coincide with the album releases were brilliantly packaged. Must-haves.