The key is their technology that surrounds your boys, and ensures that chafing is zero issue. As well, the models that are tailored more towards sport have extra support to ensure that you have no 'ball slap' or other such issues caused by big jumps and flat landings.
The comfort of this underwear is exceptional. Since trying it on, I don't want to wear much else in the way of ski underwear.
The price is certainly a bit steeper than regular underwear, but this is to be expected when you're looking for something performance.
The wicking properties seemed exceptional based off of the thickness of fabric.
If you can afford the more expensive underwear - its absolutely worth it. Especially when you're skiing, comfort is king and you gotta keep the boys protected!