I don't really think you can compare the two, it's like comparing a work truck to a sports car; they each have their function and in that function they excel.
Wolf was an exterminator, his whole purpose of going to earth was to kill the Predalien and expunge the Xeno's there. Of course he was extremely well armed, he was going up against a foe that he'd never encountered and as an experienced hunter he knew to go prepared.
Señor black on the other hand, was just on the game planet for shit's 'n giggles. He wasn't killing for any purpose other than self gain, as proven by Noland.