Other Wiki sites have a stricter, and frankly more professional policy regarding trivia. And similarities likes those don't warrant trivia. I could say he has similar personality to Lucifer from the TV show or The Fiddler and it wouldn't warrant trivia. See the point?
As for the similarity to Deadpool, I don't see that many similarities. THe only similarities are banter, and comedic relief. He's a mercenary, not an assassin. He's not a robot, nor is able to killed so easily.