I have owned both and like both really well...Like the guys have said already, Cara Cara is a bit heavy..But I like heavy, I carry a Manix for Pete's sake... But I like having the spyderco name on my knives and the Tenacious is no joke, it's the middle man between a Manix and Caly 3..If the tenacious was a lock back, it would be my choice automatically.. The liner lock does hurt it a bit, although Spyderco's liners are awesome....I'd say get the Tenacious, than save up some more and get Cara Cara or at least go some where and handle both before making a decision, Remember the knife will choose you...