but there is no rules saying that Servants are inferior to their living counterpart?
its not exception to a rule, its a truly case by case basis
its the legend that decides
Servants got stronger as they legend dictates, and legend can take form various ways
Servant Drake can go physical afgainst other Servants just fine, but human Drake was specifically said to need Poseidon's grail to fight evenly against Servant.
where did you find a time machine