Based on my experience as a former Cal dealer, I would lean towards the Caldera based on the reputation of the company and the product. The Escape series from Cal are a descent spa but now that we can see how they are holding up as they start to age, I am very hesitant to recommend them. Specifically, we have seen issues with the pumps, glue joints, covers, and a general difficulty with Cal. Wet test both spas and see which dealer you are more comfortable with.