How do armor-piercing ammo like the http://rage.wikia.com/wiki/Feltrite_AR_Rounds or the http://rage.wikia.com/wiki/Authority_AV2x_Rounds affect non-armored targets?

Do they cause less damage on non-armored targets, compared to their non-armor piercing counterparts (ala http://www.falloutwiki.com/.50_MG#.50_MG.2C_armor_piercing)? Or are they simply better versions of their non-armor piercing counterparts?

I'm asking because I am deciding if I should still use regular non-armor piercing ammo or not, depending on if armor-piercing ammo work better against non-armored targets.