To the best of my knowledge, the Sundance and Jacuzzi are identical in quality, though it does appear the lounges are a bit different. With regards to cost, disregard anything you can find from prior to 2021. Prices have increased 15%-25% since then due to rising manufacturing costs and shipping costs.
While I don't know specific costs on either of those models as I'm not a Sundance or Jacuzzi dealer, I would expect those to both be pretty good prices. Assuming the price difference isn't a deciding factor, I would base my decision on if either model offers a specific therapy need (Sundance has wrist/hand jets on lounge, etc) or whichever dealer you were more comfortable doing business with.