Though these two instruments are made after the same model, they have different
specifications. The dark colord one has extended lower notes to GG. AA/HH
are located in the back of the C#/Eb kays. The light colord one has meantone
split sharp keys. Split sharp keys are employed for D#/Eb and G#/Ab. Front
keys are asigned for Eb and G# which are normally tuned for ones without
split keys. It is no longer the case, if 17 or 19 keys in an octave.