Why Should I Buy a More Expensive Soft tub versus an Inexpensive Model
The price of soft tubs depends on the features, the materials they're made from, and their capacity.
Capacity is easy to understand; larger tubs would cost more than smaller ones. As for the features, these would depend on need and preference. Things that can be looked at are the number of water jets installed, and whether or not special devices, such as ozone blowers, are installed. Materials are also price factor. High-grade foam and marine-grade vinyl naturally come with a premium. All in all, it would depend on the features that you want on your soft tub. Usually, more expensive tubs offer longer warranties.