What's also important when comparing 3D printers is maintenance cost and effort. For example: The Ultimaker 2 we have in our Hackerspace needs regular replacement (about every 600 printing hours) of the PTFE Coupler (hot end part). Also sometimes you need to perform a cold pull (https://ultimaker.com/en/resources/19510-how-to-apply-atomic...) if the nozzle is clogged.