There's nowhere else to put this, so here's a Manga that I wanted to compare to its Anime adaptation.
Ping Pong by Taiyo Matsumoto - 4.5 (Brilliant)
Just finished reading this and loved it. A more reserved, tasteful and mature slice-of-life take on the sports shonen genre, less about techniques/matches, more about exploring psychological facets of growing up with sports such as talent, motivation, limitations, competition, and contentment. Great packaging, too.
My preconceived notions of how it compares to the Anime (which I do still think is an improvement and a masterclass in adaptation) are similar yet different from what they were before:
* I was partly wrong about aesthetic-- Ushio's soundtrack does dramatically heighten every scene, but while I assumed Yuasa had a bigger hand in the visuals, all the striking imagery is directly from the Manga, and framing/composition was 100% established by and worth solely crediting to Matsumoto.
* All words from the Manga seem faithfully included and nearly identical in the Anime (albeit phrased more cleverly), and themes from the Anime are still hinted at in the Manga, but the meaning is a lot more vaguely understated and missable. One reason is the Anime expresses symbolism more potently, re-sequences context-clue flashbacks into more sensible placements in the show, and smartly withholds previously explicit background info in order to deliver them later as more impactfully climactic and revealing epiphanies.
* Biggest difference is that 5-6 of the best scenes/threads from the show do not exist or aren't emphasized as strongly in the Manga, and these turn the characters Kong, Kazama, and even Sakuma from merely solid supporting characters into the story being an outright ensemble cast of 4-5 equally important/effective joint-main-characters instead of two primary ones. Kong in particular skyrockets into the being the best character in the show, IMO.
These additions missing in the manga show:
(1) Arguably the best moment in the show-- An incredible musical Christmas montage containing snippets that perfectly encapsulate every character,
(2) Kong's attachment to his home/mother, his bonding with his team, and realization that life is more important than ambitions,
(3) A vague/cryptic yet heartbreaking flashback-montage that hints at the upbringing that caused Kazama to prioritize the painful burden of responsibility/living for the sake of others above his own happiness,
(4) Arguably the other best moment in the show-- The more explicit framing of the Peco vs. Kazama match as "People can fly" vs. "People can't fly" (it's hinted at, but outright makes you bawl in the Anime),
(5) Peco's fire being re-ignited being more sensibly re-ordered in a way that's more efficient and gives Sakuma more of a spotlight,
and (6) A disposable background character that loses early on becomes a really charming recurring bit about feeling directionless.
* The only addition in the Anime that I think is actually worse is that they added a minor female character that is functional but not nearly as compelling as other characters.