Resolution is not a factor but if you want to split hairs the 8000 can address 3 different sections of each dot so effectively is 1200x3600. I would keep with xeroxs new tag line "let's not talk about resolution". As for clicks, if your dealer is adopting the coverage based click charges you will be able to match offset on some of your jobs.
How widespread is coverage based click charges in the USA? We are not seeing this in Australia as yet. Can the KM detect coverage somehow and charge accordingly? Or how does the dealer charge or the customer understand the cost of the specific job.
Makes sense to go down this model imo.