Allow me to offer some of my own experiences (mistakes) .
I wish I had:
Watched every YouTube video on the use of milling machines (how to select one, how to use one - names like Dale Berry, Blondihacks, Joe Piecezynski, Stuart de Haro, and dieselshadowman come to mind)
Haunted machinist forums (like this one) and lurk to digest every post discussing milling machines (avoiding the temptation to enter conversations for the first couple of visits)
Selected a machine that was more than I immediately needed and saved my money to buy the best I could possibly afford .. even it I had to wait a few months.
Drawn up a plan for where I would place my equipment and created a plan (as well as a contingency plan) for unloading, preparing and setting up the machine(s). Will I need 220 volt outlets where I don't have them now.
You might buy a mill, learn how to use it and become quite proficient, only to discover that you want to do work that requires an upgraded machine.
I own a very nice mill; but it's small and some of the work I do (or want to do) would be much easier if I had one of the mills you listed. My mill doesn't have a DRO; so now I have to buy one and install it. My mill is gear driven and I am converting it to belt drive.
Hope that helps ....
I'd suggest you print out the descriptions of both of the machines you listed. Compare them side by side, including all the extras. Then, as you study videos and forum discussions, you'll better understand the options you have to consider.