The best boot is the one that fits your foot is the correct answer.
That being said most boots are not going to fit your foot perfectly off the shelf unless you magically have the exact same foot they modeled the boot from. The human foot has HUGE variation, it's pretty impossible to accommodate every foot shape. Knowing this means 2 things. 1. Make friends with a good bootfitter. 2. Buy a boot that is easy to customize.
This is why racers ride full plug boots. The boots are just blocks of thick plastic that no one can fit their foot into off the shelf because you are suppose to have a good boot fitter carve out the boot specifically to your individual foot shape.
On the other hand, some of the low end recreational boots have thin plastic and badly placed plastic joints that make those boots very difficult for a boot fitter to work with if you need any custom work done..