Uit deze blog:
http://stretta.blogspot.com/2008/12/roland-jupiter-8-vs-mks-80.html
In a nutshell, the MKS-80 rev 3/4 shares a lot in common with the Jupiter 6, and the rev5 is completely different from both the rev4 and the Jupiter 8. There is no rack mount Jupiter 8.
The matter gets even more confusing when you take into consideration the different revisions of the MKS-80. The MKS-80rev3 and MKS80rev4 have identical hardware. The only change is a software revision. The MKS-80 rev3/4 shares the same voice board as the Jupiter 6, and the the Jupiter-6 leaves two voices unpopulated. Additionally, the MKS is has a bass boost circuit. As you can see from the chart, the rev5 is based around a completely different set of chips. The IR3R05 filter is the same chip used in the later JX-8P, Super JX-10 and MKS-70.
It is also worth noting, the IC used is only part of the total circuit. Even though some instruments may use the same chip, the sound can differ. This is especially true for the IR3109. The Jupiter 8's filter circuit shares more in common with older instruments like the Jupiter 4rev2 & Juno 6/60, than it does the 'next' generation of instruments like the Jupiter 6 & SH-101.
Speaking of the Juno 6/60, this instrument can produce a class of sounds very similar to the Jupiter 8. The Jupiter 8 is a more sophisticated 2-osc per voice instrument, so there are many things it can do that the Juno can't, but the Juno 6/60 shares the same VCA, filter, and envelope ICs as the Jupiter 8. When it comes to arpeggiator work, which requires a nice plucky character, the Juno 60 has a very Jupiter 8-ish quality in my opinion.
The Jupiter 6 and MKS-80 are both wonderful synthesizers - but they're not a Jupiter 8. Also keep in mind the MKS-80 can do a bunch of things the Jupiter 8 can't, like respond to aftertouch and velocity, for example.
