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.
Although many good citizens own and carry guns, keeping communities safe still fall on those who carry badges.
In a gunfight, even if you do everything right, you can still get killed.