Higher-priced ski boots typically have a more complex blend of pliable materials, which provide a precise boot fit and performance. They can offer a more tailored fit out of the box and additional features like grippy soles for walking over ice.
Also, narrower boots typically cost more, so skiers with those alleyway feet should upgrade from the get-go for a good fit. Premium boots also have liners with a blend of various foams, which enhances security.
Overall, more expensive ski boots are worth the investment for a better fit but not at the exchange of comfort. If you are new to skiing, it’s a good idea to start with a cushy, soft boot versus pulling on a more aggressive-fitting premium boot right away.