Werner is not impressive at all. He has no special qualities. He's not fast, quick, explosive, or strong. If he doesn't win early with his pass-rush, he gets stalemated. He's one of those "try hard" football players who is a better college player than NFL player. NFL tackles will abuse this guy.
His physical traits and ability isn't even close to Tank if you watch the tape. Tank is a monster - a much more polished version of JPP coming out of college.
Why take the 2nd best DE on his own team at 19? Wouldn't that leave a bad taste in your mouth?