the latter changes the users token to a password. The former tries to reset the token to the default pin/password.
If you're using just a password, not a token like a smart card, the latter clears all the password history etc as well which can be useful.
That is exactly what I expect.
However during a recovery phase in both cases the user needs to redefine a new password.
I think reset to default password should not ask for a password and use the password which is configured in the policy.