The speaker cabinet in which I want to install the 2 speakers is not ready yet, but a few days ago they brought a pair of Gemini GVX-15 passive boxes for repair. I quickly installed the 15HP1010 in one of them. The other speaker box from the pair already had a Thunder PA15-PX4 installed, which the customer brought in as a pair for replacement. The PA15 had very similar parameters. The Thunder was a little more sensitive +3dB (96 vs 99). When listening, the +3dB was noticeable, but the Faital's bass and sound were much nicer and more defined. Of course, this was a very short test, but that's all I could gain during that time.
Thunder https://mkaudio.hu/termekek/thunder-pa15-xp4-hangszoro-1600w-8-ohm-ontveny-kosar-15-38-cm/
Gemini
https://www.bax-shop.be/nl/producten-uit-assortiment/gemini-gvx-15-passieve-15-inch-luidspreker#reviews