Earlier quoted context omitted.
I switched to Sublime from Vim because it looked prettier, but Atom looks better out the box. Also, Sublime barely moves on my 09 tiny macbook air, while Atom performs well. On the 2014 iMac, slowdowns on big files I barely noticed, what I don't like is that if you have the editor open forever, it starts moaning like a dying whale, regardless of the beefiness of your rig.
>I switched to Sublime from Vim because it looked prettier I find this to be a very curious reason to switch from Vim... were you a very experienced Vim user? Ever give MacVim a shot for the different color schemes? Don't get me wrong, I like my editor to look nice also, but Sublime isn't exactly a prettier version of Vim - they have very different strengths and weaknesses.
Also, it's not really that different, save for the modal editing stuff. Anything else there is either a plugin, or a clone, or better stuff.