Well, at 400 plus you are going to be on the ladder reticle so they are the same. The donut is faster, and gives you more reference points. Top of donut, top inside edge, bottom inside edge, bottom edge. I would go with the donut. Triangle could be more precise at 100, but if you are just going to shoot at 100 yards then there are a lot less expensive optics that would do just fine for you. My 2 cents...