Definitely a forward cant/FBI cant hides your gun better. An FBI cant is 11-degrees (IIRC) but you don't necessarily need that much cant to conceal. Really depends on your body and where you wear the holster.
Personally all my holsters are straight up and down (no cant). Holster at the 3-o'clock position, by the arm. I find it easier/more natural to get a proper grip and drawing.
In a gunfight, even if you do everything right, you can still get killed.
And thank YOU for being perfect, all the time, every time. Go forth and reproduce. We need more of you.