It again appears that the GMs were more consistent in their choice of first move. Four of the five games with the GMs as White started 1.c4, which was not chosen by any of the lower rated players as White. Are the GMs using some kind of chess logic which escapes the others?
[It should be mentioned that the software I'm using to produce the diagram doesn't handle chess960 castling. That's why some variations end as soon as one side has castled.]