Although some have had success scoring digital print with traditional score wheels, you'll get the best results from a "creaser", rather than a score. The toner-based digital print process actually "bakes on" a thin film of a hard plastic-like substance. This is why, if you fold digital print, especially with a fair amount of color coverage, and double-especially with thicker cover stocks, what you will notice is that the print "cracks" at the fold. Scoring starts at one edge and proceeds to the other edge causing successive "wave" effect during the process. Creasing is a single bar that hits from one edge to the other all at the same instant thus preventing the "wave" effect.
We use a Duplo 645. It works well for us, but, there are several other brands out there.