Not seeing any explicit connection between the two. The minor parallels are generic enough to be coincidences.
I think what
Uzo was getting at was the fact that they're both wearing green coats and have knife belts around their bodies worn the same way. As well, the jacket collars are folded the same way and they both have white shirt collars folded outward from in there. Dark hair and fairly dark skin tones, too.
Granted, those could be considered generic, like you said.
EDIT:
"The call me... BLADE! Blade -- the VAMPIRE KILLER!!"
The Combat Cross' nickname: The Vampire Killer
There's that, too.