It's not a "benefit over" thing, they're tools operating at completely different levels and thus not necessarily exclusive.
cython binds to the C API of CPython, meaning you've got the same problem loading a cython-compiled extension into alternative implementations as you have with other CPython extensions.
If HPy succeeds, cpython can (hopefully) have an HPy backend and generate HPy bindings, somewhat transparently.
It's not a "benefit over" thing, they're tools operating at completely different levels and thus not necessarily exclusive.
cython binds to the C API of CPython, meaning you've got the same problem loading a cython-compiled extension into alternative implementations as you have with other CPython extensions.
If HPy succeeds, cpython can (hopefully) have an HPy backend and generate HPy bindings, somewhat transparently.