V-Stuff seems to list these tracks as the different "Whatever" versions:
WHATEVER (version J) --- mixed by Atsushi Hattori
WHATEVER (version J - Instrumental) --- mixed by Atsushi Hattori
WHATEVER (version M) --- mixed by Izumi (DMX) Miyazaki
WHATEVER (version M - Instrumental) --- mixed by Izumi (DMX) Miyazaki
WHATEVER (Ferry 'System F' Corsten Dub mix) --- remixed by System F
WHATEVER (Ferry 'System F' Corsten Non Vox extended mix) --- remixed by System F
WHATEVER (Ferry 'System F' Corsten Vocal extended mix) --- remixed by System F
WHATEVER (Ferry 'System F' Corsten Radio Mix) --- remixed by System F
WHATEVER (FPM's WINTER BOSSA) --- remixed by Tomoyuki Tanaka
WHATEVER (Sentimental Mix)
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Whatever (Version M) was the version from the PV, in case you're wondering.