Roland Clan goes a little slower than the FB groups. If you want lots of fast opinions, post the question there, or even worse, on GearSlutz. And I think this topic has been pretty thoroughly beat to death there.
Key things in favor of Jupe vs Fantom:
- If you ever owned or wished to own a classic Jupe model, and want that experience. The Jupes, especially the X, are really focused on that experience. You get a preponderance of the original controls, close to original layout. This extends, but to a lesser case, to the other analog synth models.
- simplicity - again, the Jupes focus on the classic Jupe experience. Since this is built on the ZEN-Core foundation, you get all that as well. The Jupe is NOT a workstation, sampler, mixer, sequencer, etc. But this is a good thing.
- more open design - the Jupes have a full midi implementation published, so you can fully integrate with fully configurable DAWs, like CUBASE, or drive everything with Midi Designer Pro 2, even potential create new models. The Jupes will send edit messages as you change parameters, so an external editor will remain synchronized. There is no midi implementation guide for the Fantom, and I have not found a Transmit Edit Function.
re:
If you want a synth with all the classic sounds of the Jupiter, Juno, etc plus new sounds and great quality this is the keyboard to get. The sounds on this keyboard are mind blowing.
The ZEN-Core sound engines are identical, so sound really is not a differentiator. And from Roland Cloud, you can get all the same additional expansions and sound packs. And the analog synth models are claimed to be headed to the Fantoms. Fantom does add SN and V engines, which the Jupes do not have.