What's the deal with the price on the S-500? Why does the S-500 cost $700, and is $100 more than the MM-6. That just makes no sense.

-They both are arrangers
-They both have 32 note poly
-They both have the same 8 track sequencer
-They have the same screen
-They both have USB
-Both have the same keybed
-They both have styles

Now the MM6 outshines the S-500 in many areas.

-Motif based sounds (S-500 based on PSR's)
-MM6 has Mega Voices
-MM6 has real-time control
-MM6 has modulation wheel
-MM6 has wheels from MO 6/8
-MM6 has over 200 arps--good ones too
-MM6 also has standard midi jacks along with USB
-MM6 ships with Cubase LE software
-MM6 has controller jack
-MM6 has 1/4" stereo outs

So what gives??? Why in the world is the Yamaha S-500 $100 more?? Don't tell me it's because of those speakers because that would be utter bullcrap! The MM-6 has features that outweigh having internal speakers big time and it's $100 less...