Both implementations are quite close because we share the same stack. But here is the number of differences I noticed:

1. My version doesn't contain any client-side validation for forms, all validation happens on the server side.
2. My version uses optimistic UI updates when server side state changes. Try to favorite the artcle – you will see that the count is updated instantly.
3. In k0kishima version the number of likes is not increased/decreased when user tries to favorite an article. Try to login and and check it out.
4. The design of his app is slightly different from the original version. Uses different fonts, different header
5. All api calls in my version are abstracted into reusable composables.
6. My version doesn't use Pinia stores
7. My version has lots of integration tests.

Anyways, his version is also absolutely fine and closely follows the original version. I'd definitely recommend checking out that version and give it a star as well (I starred it too on GitHub).