The Phaser 6180 was $250 last holiday season at Staples with free shipping. It was a close choice between it and the Kyocera, but the Phaser 6180 does not have AppleTalk support. It has Postscript, built-in Ethernet and TCP/IP, but no AppleTalk, so if one had an older computer that needed to print with AppleTalk over Ethernet, it would not have worked.
Unless AppleTalk support is in there and they simply forgot to mention it on the spec. sheet? That wouldn't surprise me. If the 6120 has AppleTalk, why not the 6180? I'm sure the firmware for the same family of printers is related.