Samurai Champloo, Gintama Recommendations
Both are similar in the way that they are both samurai anime with some anachronisms and silly humor with the protagonist being very strong.
Even the main girl character of both series eats a lot.
Both comedic, but with serious moments. Both main characters appear apathetic, but in reality feel things very strongly and have a strong sense of duty. Both main characters are strong samurai with a chaotic style that throws opponents off and are unable to express themselves normally, but seem to do so adequately through their actions. Etc. Gintama is a bit more lighthearted and has a lot more pointless comedy, but that is to be expected since it is so much longer.
Same samurai living concept. Humor in both (more prevalent in Gintama). Both have hungry characters and quite of an episodic storyline. Fights are badass and people chill out when bored.
Samurai Champloo isn't sci-fi.
Gintama is more longer and doesn't focus more on it's soundtrack values.
If you're a fan of insane action, then look no further! Sorry, that was pretty cliche. But really, the action scenes for both animes are intense. Gintoki and Mugen are both unruly samurais wielding katanas that have only seen blood, albeit for survival reasons. You'll feel the warmth of blood on your hands and the sweat on your brows from all exciting fights. There's a dash of comedy and amazing music flowing from your speakers.