The left end layout is exactly how Gaillard has my own G/C chords and would seem to be something standard. Don't be scared of that Eb as it takes you into the minors beautifully.
I'm still 'discovering' mine!
I think right end is 'standard French' though many including myself would have accidentals another way (ie made that way, or turn the plates over). If you have C#/D# instead of D#/C# then both accidental pairs 'sharpen' which is easy on the brain.
The other perhaps more important advantage is that when playing in A minor (this for many is what the G/C box was made for!) you have A,C,D,D#,E,G,A all on the pull and lapsing into A blues becomes very easy. The 'blue' notes in Am are A# D# and G and you want them same way as the chord.
I went further and turned A#/G# too - Now harmonic and melodic minors are all on pull
Of course if you are a major key sort of girl then the present way may be better - depends on what you like to play.