The last two digits determine the hard drive size, so the 6412 has a 120GB drive and the 6416 has a 160GB drive. I haven't heard of the 6416 being available anywhere yet though.
I have a Phase III (as well as the previous version) but they are both DCT-6412. Two of the differences between Phase III and the earlier version is the Phase III has HDMI output and coax output. I heard of the DCT-6416 even before the Phase III 6412 came out. I imagine that there would be a Phase III version of the 6416 as well though.
Wayne
Interesting........do you know off hand how much they cost? I live about an hour from Cox territory in Northern VA, it would be worth a trip if they have any retail stores down there. Will Comcast allow the use of a non-Comcast-rented box? Thanks!
Wayne