OK...just to preface we were in the market for a new machine recently and visited both Oce and Fuji (we are located 10 minutes from each in Chicagoland).
First things first....they are the same machine, and use the same printheads and ink so there is no theoretical difference between the 2 platforms. The only difference would then be price and service (and RIP because Oce prefers you use Onyx and Fuji prefers you use Colgate).
Price is obviously whatever you are able to negotiate, so the difference is up to you. As for service, it would depend on who is in your area and available to you. Again, we did not purchase either machine so I can't say.
As far as print quality and operation goes, the machines were not capable of printing fast enough for our needs. If you are comfortable running in their "quality" mode (which is 8 boards per hour) then it is a great machine. Just about anything we ran in the "production" or faster modes was not acceptable for our clients. Also, because there are only 2 printheads per color if you are missing more than 1 nozzle it is very apparent in the print.
I hope this helps, if you have any more specific questions be sure to ask.