He is either: A) A clone of Chris, which explains why he looks like Chris, yet sounds different or B) Alex Wesker, maybe Umbrella found out that Jill and Chris were on the ship and decided to send HUNK to kill them (or at least try)
the hell are you talking about Classic? Clones don't work like that in real life. You could make the arguement that it's a game doing it if it weren't for the fact that the games of Resident Evil actually do clones correctly. The movies don't, but the games sure as hell do. Look at Sergei's Tyrants and more specifically Alexia and Alfred. They're clones and they're just as clones are supposed to be. People made from other people's cells is all. Their memories and crap like that aren't copies, they're their own persons.
Before you die you see the Tails Doll---Backdrop Observer of the Metroid: Other M board