One of my earliest posts criticized the Black Cat anime for cramming too much material in to too few episodes, as exemplified by its superficial development of Flora-chan, a dinosaur brought to life by advanced cloning techniques. I finally got around to reading Black Cat in its original form of matter. As expected, it was markedly more fluid and cohesive.
That thing that happened to Train finally came back to bite him in the ass.
Now I know why Anibus got only five seconds in the anime: he never existed in the manga. As much as I love seeing a finite list of progressively revealed elements completely outed, I respect an author who doesn’t feel compelled to make up filler elements and give them each a token appearance just so the audience can feel gratified in filling out its Pokédex.
Another welcome improvement over the anime is that the manga didn’t shove a huge Garden of Eden metaphor down your throat. You’re merely teased about it from time to time and left to deep throat it on your own if you swing that way.
My only major problem with the manga is its shounen whitewashing, particularly during the final arc. The good guys, who avoid killing at any cost, defeat an entire band of megalomaniacal evildoers through some combination of believing in themselves and convincing their enemies that being bad is bad. A little skill-based murder wouldn’t hurt.