[neonscribe]

The lack of agreement on how to spell chord symbols is a genuine problem. Brandt and Roemer's 1976 Standardized Chord Symbol Notation provides a reasonable standard, which was adopted by Sher Music in their "New Real" line of books, but it's not quite the same as the style chosen by the original Real Book authors that was mostly kept in the Hal Leonard editions. iRealPro uses a slightly different style. Chord chart readers have to be prepared for a variety of styles, unfortunately.

[shermantanktop]

A lot of opinionated variations on chord spellings, too, with tritone subs sometimes included or not, 7b9s represented different ways, etc.