I haven't seen samurai x, so let someone else speak for that anime.
But I can give you a glimpse of how samurai champloo is:
***Review!- Very Extremely Low Spoiler Content, But Still Some, Just Enough to Get You Interested!***
Do you like hip-hop? Do you like samurai's? This anime consists of hilarious adventours and can be viewed as a part-comedy as well as part-action. It all begins when Mugen, a powerfull samurai, tries to protect a waitress names Fuu from getting her fingers cut off. He only agrees because Fuu promises to give him some dumplings to eat! Another samurai who is extremely powerfull, named Jin, steps into the tea-house and sees whats going on. He declares he has no part, but Mugen doesn't care. He attacks him just because he is a very strong samurai, and Chaos ensues, ultimately bringing a large sword fight. After that scuffle, they get in trouble with the law and end up in jail. They are sentenced to death the next day, but eventually get saved by none other than the waitress named Fuu! But she has a condition for their freedom: To try and find a samurai that smells of sunflowers...