JBL 3800: 8,000 Cubic Inch, 8” Woofers x 3 = 150 Square Inch, 83 lbs
RF7iii: 12,000 Cubic Inch, 10” Woofers x 2 = 157 Square Inch, 97 lbs
So the RF7 probably has more bass and cost less.
The JBL probably has a better reputation since it is a Harman speaker. And there aren’t many fans of Klipsch around here.
I think you have to listen for yourself to know for sure. But if you are going by popular vote here, I bet the JBL will win.