Bill, go to their websites. I know at jacuzzi's site you can get detailed specs on the tub you are interested in. Coleman and hot springs also lists the specs and features of their tubs online. I would definately say that you aren't comparing apples to apples. The aria is top of the line for Hot Springs, but the 300 series is Jacuzzi's mid-range product. You would need to look at Jacuzzi's 400 series to be making a closer comparison. Or, you could compare Hot Spring's Tiger River line to the 300 series. I think I mentioned this before, but I think Coleman is different than both of these tubs, since there is no circ. pump and there is a different method of insulation. I'm not making a judgement call as too which is better, just stating the obvious differences. I'd also be concerned with any dealer that couldn't give you the info you need a product they sell.