Well, all styles used to get lumped together as "karate" (usually pronounced kuradeee).
TKD has it's own competitions and rules, but many guys "fight" in open tournaments too.
These days, it's a game of tag, unless you find some of the AAU events that allow hard contact to the body.
I was lucky enough to encounter Joe Lewis several times. He's awesome, if you get past his arrogance.
These days, you can get a Black Belt in a year and a half...guaranteed.
I hate those schools.
Up to the time I made shodan, my instructor had only awarded 7 or 8 black belts in 20 years, and it was not pleasant when you were tested.
Ooops. The actual answer to your question is vague, but as you know, TKD uses a lot of high kicks, while karate guys usually have fast, powerful hand techniques--but this is a very generalized statement.
You can see this in the video. I think this was a karate guy fighting a TKD guy under World TKD Federation rules: full contact below the neck, no punches to the head, no stop and start, like ppoint tournaments.
My own Kenpo teacher insisted that we learn as many techniques as we could from other styles on top of the Kenpo stuff.
Funny, though, after all that, everybody usually winds up with 2 or 3 things that become their bread and butter.
