Well, shooting #2 gives the same response as shooting the Sybil.
No idea if the PS3 throphy counts them as different identities though.
Sam: "We're 98% certain General Skun-ka'pe is evil."
Stinky: "And the other 2%?"
Max: "That he's crazy and we have to shoot him! But that may be wishful thinking on our part."
(Any resemblance to KOTOR is purely coincidential, really!)