I found a guy who sells an Hp mini 2140 (Intel Atom N270 Processor 1.60GHz , 2GB Ram) for about the same price a RPi3, even a couple of dollars cheapper. It seems like a good choice since I would get a kind of UPS (laptop battery), screen, keyboard/touchpad, Wifi and I could just install any linux distro to setup octoprint.
I own an old 256MB Raspberry Pi, I have read it has low performance for Octoprint at the same level or even lower than the not recommended Pi0, would it still be a better choice to get the RPi3 for octoprint or the netbook would be a better choice?
I found this paper about an N270 vs Cortex-A53, however I can't understand the implications of this information regarding octoprint.
I am not looking for energy efficient or easy of install, I am interested in better performance, I installed octoprint on an Core i5 laptop running ubuntu server just to check if I could have any issues with installing, however I can't use this laptop to run the printer)