Skiing is like formula 1 and snowboarding is like moto gp motorcycle racing. Formula 1 is faster, more agile, and more capable just like skiing. Snowboarding is better for big mountain powder, but for everything else, especially park, skiing is more gnarly. Style potential is also way higher than in snowboarding. A triple cork on a snowboard looks forced with arms flailing everywhere and barely holding on in the landing. Boarders cant change their rotation speed as much as skiers can because their legs are at a fixed length apart attached to the board.
sparknotes, skiing progression crushes snowboarding progression when you include style progression as a factor