BTW, the hand-to-hand skills work like this...
Brawling is DX/Easy. It gives you access to some special attacks (knee strikes, eye gouges, etc) and helps with punches and kicks.
Boxing is DX/Average. It gives you access to some slightly different special attacks, helps with punches and gives you a good parry vs thrusting attacks.
Karate is DX/Hard. Similar to the two above, but with a bit more damage and a much better defence against armed opponents.
Wrestling is DX/Average. It helps with grappling, especially takedowns and power moves.
Judo is DX/Hard. It helps with grappling, and provides the ability to take down opponents while keeping your feet (unlike Wrestling). As with Karate, it provides better defences, especially against armed opponents.
Sumo Wrestling is DX/Average. It helps with grappling and slams (i.e. shoulder charge type moves).
With all of them, the names are loose guides rather than strict definitions. The skill of "Karate" represents all of the advanced striking styles, late medieval armoured knights may have the "Judo" skill, footballers might have "Sumo Wrestling", etc.