>>4182748They're the same it's just the set of characters you're using.
https://dic.pixiv.net/a/%E3%82%B1%E3%83%A2%E3%83%8E#h3_5There's also 獣人 which is very similar to ケモノ as the tags are used on Pixiv. 獣 itself literally means four legged mammals with fur all over, like cats and dogs.
https://kotobank.jp/word/%E7%8D%A3-490228Obviously though the thread itself follows pictues that would go under the colliquial use of the term defined by the pixiv ケモノ article, which is to say "animals with human-like features"
Kemono friends is interesting because it barely sticks to the premise of the characters being 'kemono' and instead just goes for any mammal, even hippos and birds. I think there was even an axolotl friend at some point.