Way to open the can O worms !
Colt IS the original 1911 , they are the standard as far as
building to spec.
So of course you pay a bit more for a Colt than other brands.
Personally , I would not worry about a $100-$150 price
difference in a gun that will last for your lifetime.
Some people do not like the safety lock system built into
the newer Colts ( 80 series and newer )
Some other brands come with a better cosmetic finish , and
more features for the price , but short of a custom built 1911
you will get what you pay for with any of the top Brands.