LA Spas paradise h2 size and weight

[Arthur3172]

Hi, I have a dilemma with a hot tub purchase.
This weekend I checked out a used 2007 paradise h2 and a brand new one. I noticed they were different heights so I contacted LA spas to get the exact specs. The 2007 is 35in in height while the 2013 is 40in, but what confused me is that the weight and water capacity is the same for both according to the spec sheet. In person the 2013 appeared deeper so I would expect the specs to show that.
Can anyone help me clarify why the specs appear off?
This is getting built into my deck so the contractor has given me a weight limit.

Thanks in advance

[Dr. Spa™ Ret.]

Volume is relative to depth, and ALSO length and width....plus (or less) the inner contours. Increase the depth and make the seats protrude out a little more, and it can be the same, or even less volume.

I have a field that's 50' long. How many square feet is it? ;-)