Mp3 Transposition Flexibility on Genos and S975

Hi Fellas,
Im lucky enough to own a Pa4x. When I use Mp3s I have a lot of flexibility with regard to transposing keys on the mp3 and/or the keyboard. I wanted to get a Genos or S975. Does either allow me the same flexibility.
Thanks Frank

Please elaborate more on what your specific needs are regarding using Mp3's....
all Kbs mentioned can transpose keys.