To me they are very different, the PM2 is hands down a better slicer and better for delicate/precise cutting, but the 562 is better than most other big ZT's. I'm sure it would be harder to break the ZT blade/tip but how many of us have broke either unless we were doing something abusive. The ZT feels a little more solid in the hand, but I think that's more the weight/finger grooves.
The PM2 almost disappears in your pocket, and it has a great handle shape with good grip with full G10, and much better jimping. The Jimping on the 0562 is worthless, even worse than previous ZT's but the finger grooves make it feel very secure in the hand, but the flipper on the ZT makes a very nice choi. It's difficult to open the ZT slowly and controlled if that matters to you, I got tired of coworkers asking to see my switchblade. I'd much prefer some more texture on the Ti slab, a coarse sand blast perhaps. I'm also not a fan of the deep pocket clip, to me I'm not out to conceal my knife, all a deep carry clip does is make it harder to retrieve the knife from my pocket, and makes me re-adjust my grip once it's removed to reach the flipper. Detent on both is great, very secure.
Both are great knives, but very different, I'd be willing to be for 95+% of most peoples everyday use the PM has a better blade shade/thickness. Not that the 0562 won't work, it's just you trade off cutting ability for a thicker stronger blade.