I have the Wiener Urtext edition of the Mozart K331 (see cover image). As you can see in the picture, the 4th note of measure 55 of the Rondo Alla Turca is A (E#FGA). However, I saw two videos where people play the F note: E#FGF. I found an online sheet music that claims to be based on urtext editions and it also has F instead of A (somehow it's measure 59 there, not m.55)(see image).
In the preface of the Wiener edition, re available sources, it says "For two other sonatas (K.331 and K. 570), at least some fragments of the original manuscript have been preserved."
So which version is (more likely?) the original Or most adopted?