I dont know what the mechanism is of the Tac A1 trigger, but if there is a single adjustment point, I don't know if it is possible to adjust it enough to get the second stage to be that distinct at that weight. I tried looking up photos of the TAC A1 trigger and I cant tell how it works. Maybe post a few high res photos and I can suggest something. Otherwise the Timney with the ability to adjust both stages independently it should work better for you.
It has a single adjustment screw that seems to only affect the second stage while the first stage is driven by the trigger spring. This is likely why everyone is such a big fan of the Yo-Dave or various other trigger spring kits.
That being said, I got a small promotion at work and decided it was enough to justify buying the Timney trigger haha. Once I get it and install it, I'll get back with how they compare and whether my $190 was wasted.