If you go to
1911 Forum or
M1911 Pistols forum there are numerous threads on this. M1911 has quite a following for the Checkmate magazines with the hybrid feedlips.
Many do not like the Wilson because the follower is all polymer and
will with time wear and not lock the slide back. Tripp Cobra Mags
solved that problem with their hybrid follower; metal & plastic.
Tripp also makes the Flexfollower that is "no-tilt" and all metal.
Checkmate's follower is like this only coated in black Teflon and with
the dimple. (see above)
Some on those forums feel the springs prematurely weaken with the
Wilson mags. Tripp has some of the strongest mag springs around. Chrome
silicon and ever so slightly larger wire diameter. Wolff offers what is
referred to by those buying and using the Checkmate magazines a an 11#
spring. These can be specified when order Checkmate mags directly from
the factory.
Checkmate makes OEM mags for Colt.
Check out this website as well
1911 Magazine Analysis and
1911 Magazine Analysis, Part 2Checkmate