Good for a post-Christmas morning chuckle! OP, yes, you will notice a difference, whether or not the 0452 is The Knife for you. I have quite a few duplicates of various ZT models, and I'm one that reports no issues(and several were purchased second-hand, here). Getting into the $150-200 range is expensive for me, and I've reached my point of diminishing returns with my WE 608. I dearly want to love this knife, but I just can't get there. The action is wonderful, the ergonomics can't be beat by anything else I own, I've jokingly said I feel it's too, "Klingon War-blade", but it is a very respectable tanto grind, so... I've also owned a Terzuola ATCF, and two Microtech DA copies thereof. Beautiful! Unequalled dreams to handle! WAAAAAAYYYYY too much money for me to carry with a pocket clip, traipsing around in an ambulance. Sold 'em.
I too love Spyderco, but aside from a bare handful, I have no desire for much of any of their offerings post-2004 or so, because of the way-too-artsy designs, or the uninspiring leaf/Endura/Delica re-issues.