I've been watching for a comparison between these two since Apex came out with it's kit. I already had the Wolff kit in mine before the Apex came out or else I would have bought both. As it is I am immensely happy with my $8.00 Wolff kit and will not be buying the $24.00 Apex kit just to try.

It would be great if someone could install both, one after another, into the same gun and take trigger pull measurements. For some reason I can't find mention of anyone doing that.