The onslaught has a much thinner blade than the ZT series. You'd be able to pry just fine with an 0400 with its reinforced tip, not so with the onslaught.
Gunk in the axis lock won't make that knife happy either. It also has smooth G-10 -- not conducive to a solid grip.
Lastly, BM has a silly warranty. Zero Tolerance has a no-BS policy.
Yeah I was about to reply about the blade thickness. I'm just deciding now between the ZT 0400 and the Entrek strike point mk2. http://www.bladehq.com/item--EnTrek-USA-Strike-Point--7643
anyone have any experience with this?