On the subject of printing and colour variation, as Laserschwert pointed out there's loads of variation even in official output. I think it comes down to personal preference and what image you are used to.
I also had the new MI1 poster professionally printed, on fancy paper with a GiclΓ©e process. For me it came back extremely over saturated, luckily the printers had a no quibble happiness deal, I de-saturated the image to be more inline with my own IBM boxed version from BITD (which is how it should look in my head π).
Looks stunning tbh, it's ~60x20 cm and the detail is fantastic!