Ricoh MFPs use 2 bit depth technology with 4 shades per color, vs. Konica's 8 bit depth with 256 shades per color. The Konica color engine (which came from the Minolta side, noted for their color technology) handles color better because it is built to.
(What I see when I look at print samples of the same photo: the Konica color looks crisper and more "full bodied"; the Ricoh color looks blotchier and pixelated.)
If you have a exacting graphics or marketing client, you can't just skate by. For them, it's all about guarding the corporate elements (font, colors, logos), aka the public identity. If you want a close-to-home example, ask your dealership's marketing person for a copy of Ricoh's "corporate ID manual for logo use."
Any business worth its marketing plan must protect its corporate elements. That includes the smallest business in the smallest town. I'm sure your dealership's marketing person gets annoyed if your business' corporate look is ever misrepresented.
In my case, when I am wearing my marketing hat and printing corporate materials, I go to the Konica - because I want the best possible color in our corporate photos that is available to me.
Ricoh does not position its MFPs for the creative market. Our Ricoh Digital Support Representative often discusses this in training. He reminds us that the Ricohs handle "pleasing" color or "business" color well (aka color fills here and there in your Excel document).
Caveat: I haven't worked with the 5560 "creative" color MFP yet, which is positioned for more creative office users.