Personally I think these are the best two AIO's on the market. When judging AIO's, we talk about cut, finish, durability and ease of removal. While I think BF One has just a hair more cut, I find these 2 to be very very close in all aspects and have no problem using either in my AIO package.
One thing we don't really talk about is the look of an AIO. I have noticed that I like Speed on darker colors due to the depth, richness and glow that it leaves behind. It also has a slight darkening effect. BF One leaves a crisp, bright look that I like on lighter colors.
Both are great products and you can't go wrong with either. This is just something I have noticed. Most AIO packages this slight difference goes unnoticed nor does it really matter. Anyone else notice this?