About basis of Japanesey font differences, it may be convenient by start searching with 許容字体 一覧 or 異体字 一覧
許容字体 should be easier to get started with.
- 漢検準1級 許容字体のある漢字一覧 | おにぎりまとめ
-
準1級配当漢字 許容字体表 (highlighted with
document.querySelectorAll('.kanji img').forEach((el) => el.style.border = '2px solid red')
) - JIS包摂規準 - CyberLibrarian
I will list the ones that worth mentioning (in my opinion).
Font differences
倦
噌
徽
工
I saw these a while ago, but I can’t find in a list.
Some are easy, if you know the basics.
- 「ネ」が「示」の型。
-
榊
-
祓
-
榊
-
卿
-
嘘
Different encodings (no need to change fonts, e.g. 嚙む)
鬱 欝
函 凾
萌 萠
蠅 蝿 (Simplified Chinese is 蝇)
鉤 鈎
剥 剝
竜 龍 (Simplified Chinese is 龙)
Some will be easy to recognize, if you know a little of both simplified and traditional Chinese.
寿 壽 (I have seen both in 寿司屋’s sign)
賤 賎 (Actual Simplified Chinese is 贱)
蝋 蠟
填 塡
涜 瀆
痩 瘦
掴 摑
侠 俠
噛 嚙
壺 壷
屡 屢
為 爲
隠 隱
撹 攪
蔣 蒋
Some (unlisted) have zero (0) vocabulary result in Jisho, but then, you will probably lookup the Kanji, anyway…
異体字
I also found that this website has a nice collection of 異体字.