In fullscreen mode (maximized view, no face or gui bar on the bottom) armor type is shown incorrectly. Values up to 100 show up as green, while values above as blue. So, green armour + armour bonus shows as blue. Blue armour damaged below 100 shows as green.
Green armour, regardless of point value, has lower damage absorbtion percentage. Blue armour is prioritized more over health when damage is received.
Note that it works correctly in default view (the one with face).
My version of Vavoom is 1.31 on Linux, compiled from source, Software renderer.