I have one of each. The arsenal is a bit more difficult to install as it doesn't have the sleeve that holds the trigger and disconnector together. As for everything else the tapco seems to fit better in both the arsenal binds up in one but not the other. But my problem there is with the disconnector hanging up not the trigger binding. If I get another I will probably get a modded tapco.
In a hour of darkness a blind man is the best guide. In an age of insanity look to the madman to show the way.