Massive Audio walks all over pioneer brand , the crossovers etc are way better then all but the top of pioneer range. why slim mounts ? don't need them on most cars ?
there are only a few dozen big speaker plants in the world, they rebrand /mix the specs on parts a bit and sell at different price points. which is why so many speakers look like Morel, Dynaudio, vifa, etc.
I know a speaker designer in USA and he provide specs, and farm the construction out to Kicker in stillwater Oklahoma, in case you wonder , he does sonic boom recreation for NASA on the spaceshuttle and a few other massive projects.
amps are the same way, they use the same boards with different logo and heatsinks on a lot of major brands.