Yes, better Roland than Mutoh. But better Latex 300 than both.
From what I have seen/heard, the HP latex machines are great machines, when they are printing, but they seem to be finicky machines who freak out over the smallest abnormality in conditions.
I do support for that machines, and you can be shure that I would know if the machines "freak out over the smallest abnormality in conditions"
. It is just the opposite, the people get their machines and from a lot of them you never hear any problem.
As for maintenance, I may be in the minority here, but I only clean my Roland about once every other month, still prints like brand new after 2 years.
Roland suggests to have a maintenance of the printers every 6 months (replacing cappings etc.). If you don't do that you could have luck ... but sometimes in the future you will run into trouble. And, even if you had no need to replace a head until now, sometimes in the future you will need a new one. In Switzerland, for the price of roland inks per ml in comparison to the HP-inks, you could pay for the heads and the maintenance cartrige and roland ink is still more expensive.
One of the biggest advantages of Latex 300 in opposite to a eco-solvent is the impressive scratch and chemical resistance.
One time a Eco-Solvent-User have bought a Latex 330, and during delivery he told me "by the way, the scratch resistance of the prints you showed us during the demo, we can't believe that, we will do our own tests". An other visitor came back to the table with the samples every few minutes to try again scratching the prints.
An other time someone visits us for a demo who want to replace two Photo Printers (HP Z6100) with latex (because of cheaper consumables). A few days after the visit and tests in our show room they have decided to not only kick that two old HP's, but two rolands too. Until now they have got three Latex 360, and still have one roland in use just because it is very new (1 1/2 years).
One time a customer has bought a Latex 360 blind, just because of print samples. A few weeks after installation, I had him on the phone, and he was really amazed about that machine.
If showing samples to customers, lots of them are asking "what kind of laminate you have used on that prints"?