Difference between HP OfficeJet 6000 and 8000 wireless???

[nostob]

I'm slightly confused to see the difference between the HP OfficeJet 6000 and 8000 wireless. The only differences I can see:
- 6000 is slight newer
- 8000 is slightly faster
- 6000 has a paper detect.

List price of the 8000 is more than the 6000. However, the 8000 can almost be had free (with trade-in). Why would someone opt for the 6000?

 

[nostob]

Anyone? Is there a difference in resolution?

 

[hree]

from http://www.consumersearch.com/printers/hp-officejet-pro-8000-wireless/

The HP Officejet Pro 8000 Wireless inkjet printer is similar to the top-rated HP Officejet 6000 Wireless(*Est. $80), only the 8000 model is designed for heavier-duty office use, with a thicker plastic case, slightly faster printing speed (according to the specs) and the ability to print a maximum of 15,000 pages per month (versus 7,000 for the HP Officejet 6000 Wireless). Both printers accept print commands wirelessly, and both include an auto duplexer so you can print on both sides of the paper. Both crank out text-only documents snappily in some tests, although nowhere near HP's promise of more than 30 pages per minute -- more like six to 12 pages per minute.....