I knew the sliders would be small, but the ones on the J8 model have the same issue as the reface sliders. Good luck getting fine parameter tweaks with that short of a throw. Even if the sound was 100% spot-on, I would still need an external editor to program that one.
Note that this is being said by a guy who complains about getting fine parameter tweaks on a Juno 106 due to the lack of a parameter read out screen. So your mileage may vary.
I will say that if they are only 4 voices, that has spoiled me a bit on getting a System 1. If the DSP in these is really that much better than the DSP in the System 1, why are they cheaper? Is it the lack of green LEDs?
I was really hoping for a Creamware Noah like collection of synths for the System 1, but it seems like they are separating them out despite the ACB technology. I will probably get a 1m on sale, but I really want one system that can run all ACB synths.