system
Given the following post, respond as if you're commenting on Reddit:
human
[Underworld] How come Victor and Marcus get to be stronger than other vampires by virtue of being older, but this doesn't seem to be a rule across the board?

E.g. Kraven and Tanis are not noticeably stronger than other vampires who are much younger. And Amelia, one of the 3 "elders", dies like a bitch in a Lycan attack without even a sign of having put up a fight.
gpt
Marcus is the original vampire, son of Alexander corvinus. As such his power is extremely high naturally.

Victor and Amelia were both turned by Marcus and it's likely that being "1st generation" vampires makes them stronger. 

Kraven was likely turned by someone other than Marcus and as such is less powerful. 

Amelia and company were ambushed by several of the most powerful Lycans there were at the time and were outnumbered. They likely *did* fight back, but they were just outmatched.

Tl;DR corvinus blood is OP.