Similar-but-different? So we COULD be Shards of a whole person!
These are some of my favorite comics, they're all by the same guy who is AMAZING:
The first is the Powerpuff Girls Doujinshi, which a mega crossover of different cartoons, mostly from Cartoon Network, into a sweet, epic storyline. It also has some real drama to it, which is fantastic. I personally find Dexter's storyline pretty relatable and VERY compelling.
Next is Sugar Bits. It's my least favorite of the three but still fantastic, with kooky, interesting characters and some awesome worldbuilding.
The last is my favorite. Grim Tales From Down Below is REALLY GOOD, and one of the best crossovers I've ever read. It's mostly based on The Grim Adventures of Billy and Mandy, but don't hold that against it. Warning: It's pretty dark, and some of the story elements are pretty dang unsettling.
Warning overall: The comics have a definite lolicon slant, but it's pretty low key, mostly. You'll know it when you see it. The art, though, is fantastic. Especially the giant monsters and stuff. Very good eye for detail.