The HP LaserJet Blog by Vince Ferraro has posted an interesting collection of resources regarding the performance and print quality of a competitive set of desktop and workgroup color laser printers*. This includes four separate detailed reports that go beyond typical cryptic printer reviews.
While not surprisingly (for a few reasons) the HP (NYSE HPQ) printers compare VERY WELL to the competition from Xerox, Lexmark, Dell, and others, the reports are produced by reliable third-party testing concerns QualityLogic and Spencer & Associates Publishing, Ltd (to old timers, simply "Spencer Labs"), and include lots of testing details on both performance and quality that both reflect real-world print speed comparisons (way beyond vendor "ppm"** claims) and the many components of print quality that combine into what real users notice.
* Printer models compared: Samsung CLP-300N, HP Color LaserJet 1600n, HP Color LaserJet 4700n, Xerox Phaser 6350DP, Konica Minolta 5450, Kyocera FS-C5030N, Ricoh SP C411DN, Lexmark C762, Dell 5110cn, HP Color LaserJet 3800n, Xerox Phaser 6300DN, Okidata C5450N, Xerox Phaser 8550DP, Ricoh CL3500N, Dell 5110cn, Lexmark C524n, HP Color LaserJet 3600n, Okidata C5250N, Xerox Phaser 8500N, Samsung CLP-600,Dell 3110cn
** ppm = pages per minute