There is a difference in a core logo and a treatment of a logo. Also the color usage (Ie: t-shirt spot color print versus CMYK full scolor screen printing).
I present a mark I did a few years back that I stumbled upon for a corporate giving campaign. It shows the difference nicely of logo pahses, treatments, and color depths.
Take notice how the plane changes per the need in the logo artwork to best signify action for the logo usage.