georgewbushHardlex doesn't even compare with sapphire on the scratch front. It's main advantage is resistance to shattering and also that you can replace it cheaply when it does get scratched, which it inevitably will.
georgewbushMy Seiko SNK Fleiger uses a hardlex crystal, and it got scratched within two weeks of wear (I knocked it against a desk, not even on a metal surface). It's more scratch resistant than the glass you would find on something like an iPhone, but it will certainly scratch at some point if you wear it frequently, although I hardly notice the scratch unless I look at it from a weird angle. It is significantly less scratch resistant than Sapphire, that much I can say for certain.