The replicants he was up against were all physically superior (A-level); Rachael, to name another replicant was also Nexus 6, yet she did not exhibit any of the superhuman abilities/traits the other reps have.
So evidently you have all kinds of replicants, from A-level (the strongest) to possibly B- and C- classes. (As evidenced in the information given at the briefing by Capt. Bryant, there are also mental
classes ranging from A (your regular genius) over B (average?) to C (not too bright).
This inevitably brings up the question: what is the purpose of making a rep with average human abilities. Once again, consider Rachael’s case. She was a replicant who wasn’t supposed to know about it. In order to pull this off, she would have to have “average” human abilities, not the superhuman qualities that Batty or Leon, for example, had (because otherwise she would find out right away that she was a replicant). And implanted memories, but that’s another discussion in itself…
Likewise, if Deckard was supposed to be a replicant, and he wasn’t supposed to know about it, the *only way* to pull it off (without letting him find out or making him suspicious) would be to give him
average human skills and abilities, and NOT make him a terminator of sorts. Unfortunately this would indeed mean he has to deal with physically stronger opponents.
Posted in: 4.5. Deckard