I remember when Chinese made APV's ie Sig early on, imo were all about gloss and bling but not substance, and when the first "clones" of high end gear came out they were obviously aiming at a superficial buyer (dumb enough to not know or care about quality). They were poorly functioning junk.
The vapers who wanted to pay less for a fully functional mod (me too were like; "why don't they care about making it work well?"
Since then functionality has improved, but on the whole, I'd guess about %70 of clones are not as functional as the real deal, which was designed for the discriminating vaper... you know, innovation.
as far as i'm concerned too many of the real mech mods have glitch prone switches too! and then a cloner makes thousands of those too.
still looking for the perfect mech.... good conductivity; great switch and contact adjust. designs... fool proof; peerless.
looking for the "Peerless" mech
def: incomparable, matchless, unrivaled, inimitable, beyond compare/comparison, unparalleled, unequaled, without equal, second to none, unsurpassed, unsurpassable, nonpareil; unique, consummate, perfect, rare, transcendent, surpassing; formal unexampled.
then the Peerless clone