Well sort of true, the extreme recon and 392 has the same brakes that come on the Gladiator. The JT has bigger rotors on the rear than the JL due to towing capacity. Side note the Extreme Recon and 392 use the same housing as the JT which has 3/8 tube thickness.
I should also note that the caliper bracket itself on the rear is also different.
As for the Mopar Performance brake kit, I'm pretty sure they are just the standard Rubicon breaks. Only because that kit has being sold from Mopar in 2018 well before the JT, 392, and Extreme Recon where announced.