first of all tango in basically argentinian despide the fact that it was originated in france. but the difference is that in argentina the Tango is danced in a special way showing more feelings and passion.
at the very begining "tango" was danced by men and in "cabarets" so imagine how is the dance itself.
the European tango is danced more like "Valls" is more sthetic and formal.
Argentinian Tango has its own rules and steps.