Thank you for your input, let me clarify where I can. You are correct, the Epson will do an auto cleaning as does the Canon. My experience is that the Epson's clog more. Once a day, is a lot and every time the Epson does an auto cleaning, it is wasting ink and money. The Canon, in my 5 month test NEVER clogged. Not once. It never needed to be checked, it would fire up after a week of sitting idle and print without any issues.
The previous generation Canon heads did wear out more quickly, this generation seems to be doing better. I have two production customers that have been running them for a year without issue.
The cost of a Canon print head is $597 CAD or $413 US. Much less than the previous generation heads. The heads can be replaced by the user. Epson requires a service call and a minimum of $500.00 on top of the $1400 head, $1400 is the price for a print head in Canada. That's a huge difference!
Canon PF-04 Print Head for ImagePrograf Printers 3630B003AA B&H
Epson does have the advantage for sure on the straight paper path and loading media.
The Canon has a lower L* value, a very slightly bigger colour gamut and in my opinion was equal to the Epson except for the darker blacks.
When I magnified the printouts x35 on both printers I thought the Canon had a better dot placement. GMG has started to recommend the Canon's for dot proofing over the Epson's. That says a lot.