I am sorry to also think neither of these options at the mo. Get a SAK, even the soldiers knife if you really want a locker.
They have useful tools, tools that you will find a do a lot of work adding to the enjoyment of out door trips.
My reasoning is that I used a SAK in my youth both camping and for everything else and despite having a healthy collection of nice locking knives, a slip joint SAK still defaults into my pocket. I carry one daily and I carry one internationally when I travel My son was a scout and I purchased him a standard red huntsman model at 10. It was his first tool kit and still gets a lot of use even after I bought him a swisstool last year. He is now 17.
I have several cold steel folders and I like them, but they have a long bedding in period and the triad lock was initially very, very, very hard to release on the majority for a long period of time. I do not think a young man of this age will be able to get it shut safely once opened.
I bought my Mum a Byrd caracara recently as a travel food prep knife and she cannot release the backlock on that safely so I have replaced it.
Therefore of the two mentioned, I would go for the rat..........however do have a think about a SAK.
Growing up should be a about learning skills, a slip joint teaches you not to rely on the knife not to fold and how to use it so it doesn't.
If you really want a lock then the locking models victorinox offer, the soldier, the trekker are safer than most other locks IMHO , have a useful and cool tool set and are very good knives.
Anyway, whatever you pick. Have fun and be safe