Wick is about the same size as Thurso, although it takes longer to get there by train, has less buses to John O'Groats, and doesn't have a hostel. If you go there you will find a few decent pubs and cafes, including a Wetherspoons pub with cheap food and drink but no atmosphere. There is also a club, and a few shops. Basically, unless you are spending time visiting the whole area Wick offers nothing that you can't find in Thurso.