I teach both ski and snowboard at ski school
To me, the learning curve for snowboard is a lot sharper than skiing. Once you get the basic sorted you will progress very fast
Skiing's learng curve is more like a ladder, you started pretty good, but then you plateau for a bit (wedge turn:1st plateau) then you learn how to turn starting with a wedge then finishing turn parallel (Wedge cristie: 2nd plato) after more practice you'll learn how to turn with both feet (Basic Parallel turn: 3rd plato) and so on and so on
There are a lot more to learn on 2 planks of wood than 1
