I've seen MY FAIR LADY several times. However, it wasn't until last night that I finally saw the 1938 version of PYGMALION and this was very interesting indeed. It seems that MY FAIR LADY is actually NOT based on the George Bernard Shaw play as much as it's based on the Leslie Howard movie. That's because the dialog (particularly Henry Higgins') is often word-for-word that of the film. Additionally, both films have the same ending--one that is NOT the same as the original play. In the play, the ending was more sad but also much more realistic and consistent with the characters and their growth (or lack thereof in the case of Henry Higgins).
Quality-wise, both films are superb and I enjoyed them immensely. One very obvious difference is that MY FAIR LADY is a musical with lovely songs, so it's a much longer movie. Another is that although Leslie Howard did a very fine job, somehow Rex Harrison came off as grouchier and more entertaining in the lead. Another major difference is that MY FAIR LADY feels more like a comedy and PYGMALION feels much more sad and deeper emotionally. Because it is a bright and colorful musical, the characters in MY FAIR LADY seem a bit less real, but with PYGMALION you are almost brought to tears late in the film.
My recommendation is that you see them both. Both are exquisitely produced and acted and you can't go wrong with either one. I could say more in my review about this film, but considering that there are already a zillion other reviews, I'll end it here.
UPDATE--Only days after posting this review, I got quite a few "not helpfuls". I assume this is from fans who adored this 1964 film. Well, my response is that it can't merit anything more than an 8 because the dialog was directly lifted from the earlier film AND so much of the singing was NOT done by the stars themselves. To me, these are flaws that prevent the film from earning a higher score. And, while I think about it, cannot justify the many 10s I see for the film.
