Standard cuffs without thumbholes work perfectly well for most skiers and riders. They're simpler to put on and take off, and you won't have to deal with the sometimes-annoying feel of fabric stretched over your thumbs if you're not using that feature.
The main tradeoff is that sleeves may ride up when you're pulling on your midlayer or jacket, and you won't get that extra bit of wrist and hand coverage that thumbholes provide. If you tend to run warm or ski in milder conditions, this probably won't bother you at all.
Thumbholes really shine for cold-handed riders who want an extra layer under their gloves, but if that's not you, there's no reason to seek them out. Just make sure your base layer fits snugly at the cuff so sleeves stay reasonably in place throughout the day.