I have had both rifles, both an AR-15 and a mini. The AR-15 is far and away better than the Mini-14. I could only see getting a Mini-14 over an AR if cost was a real issue, and there was no other options.
Yep.
Only in a ban state would the Mini-14 be an option.
A Mini is a fine choice in places like California where AR is off the table. You can tweak em or get a heavier barrel to be more accurate.