Yeah, I think for the sake of the OP's intent for this thread, you could lump chest protectors/roost guards and pressure suits/body armor all together.
Obviously their design is for different purposes, I don't think anyone would argue that point. One is for deflecting objects/impact, the other for absorbing/protecting you from it.
It really seems to me the point here is really 'looking cool' vs. wearing protective gear (of any sort).