There's probably a fine line between Roland, Mimaki and Mutoh, since they're running Epson heads and inks (Epson's saved Hexachrome for themselves, for the uber high-quality color-matching and gamut.)
But, IMO, it comes down to this: Roland is great at the specialty stuff (white, metallic inks) and Mutoh excels at higher-speed printing, such as knocking out a bunch of banners (Wave print technology).
At least that's my take on it, from a printing standpoint.
On the cutting side, it's debatable whether print-and-cut or print-then-cut is superior. Dedicated cutters cut better and more accurately, and you should laminate, everything darn near. Plus you can print on a printer and cut on a cutter, keeping both machines productive. Print-and-cut is killer for quick non-laminated lables. So take your pick.
My $0.02,
Jim