Welcome to our forum.
The key here is to understand you're definitely not talking about equal products (IMO). If you're looking to spend less money you can go with the Superior spa but its not as if you're getting an equal spa for less money, you're getting a lesser spa for less money (again, IMO). Having a local dealer, having a good warranty that you can trust to be honored, quality of manufacturing, track record, etc. are all things to consider but you have to decide what they mean to you as this is the difference between buying based on price and buying base on value.