The way armor works, if you have say an iron tasset or an armet, which absorbs 6 damage, against a thrust or a bludgeon attack, it absorbs 6. Against a ‘chop’ attack, it absorbs double (12), and against a draw-cut it absorbs triple (18).
If you look at the armor tables in Codex or on your character sheet you’ll notice this.
Textile armor is slightly different because draw cuts can dismantle them, but all metal armor works that way.
In other words, thrusting and bludgeon attacks do the least Crit damage (d6) but have the best chance to get through armor (1x DR).