It doesn't. Stealth is very basic and has too few tools to play with. Corvo The Choking Maniac.
And Thief has the magic blackjack. I'm not gonna argue Thief isn't a harder and more complex game... it is, as are most games made 15+ years ago compared to today's. However if you want something that feels similar in play-style and look/feel, I'd suggest Dishonored over Styx, which is more a fantasy Splinter Cell IMO.