The different systems out there for cutting are really different in how they approach it.
The Accuquilt Go!, for example, uses dies to die cut the fabric; you need to turn a crank to run the die (with fabric and cutting mat on top) through the machine. The Studio version of this machine also uses dies, but it is much heavier, can cut more layers at a time, and requires a dedicated spot for it. (The Go! is lightweight and portable.)
The QuiltCut system uses a ruler and rotary cutter. I have heard that it takes some dedicated space to leave it set up.
I have an Accuquilt Go! and like it. I don't have difficulty cutting accurately with a rotary cutter and ruler, so I can't see how the QuiltCut would be of any additional benefit to me. I especially like the Go! for cutting triangles because it automatically lops off the corners for easy matching.