Perception and "social perception", I feel like I'm taking crazy pills! Options

[masterofm]

Ok now perception and socially perceiving someone (as in checking someone out using your social skills.) What is the difference? Lets say you are talking to a Johnson and you have one shadowrunner at the meet is the face, and one shadowrunner who is the perception monkey. Now when both are scoping out the Johnson what would each person notice, and how would they notice it? Is most of the social perception dealing with body language, tone of voice, eye and mouth movement while perception would notice what the person is physically doing? Maybe is the person really good at noticing things like that that the Johnson has a foot tick, but be unable to pick up on the fact that it is actually the Johnson's tell if he is lying?

The problem I have is that what different forms of information do you receive when using these two different skills? Can you use team work despite the fact that they are different skills? Does a face receive penalties when socially perceiving if they can not see the other persons face, like the other person is wearing a helmet and full body suit?