I love both of those knives, but the cutting edge length is where the similarities end. The pm2 is a handful on the grip. The 0450 is light, thin, and slender. Both amazing, but oh so different.
As already been mentioned, the 562cf and 801 are good options. It's really hard to beat the 801 for grip comfort. I think my 562 rides a bit easier in the pocket. Most ZT's will have more cutting edge over any knife with a blade finger choil.
The 452cf actually rides in pocket like a much smaller knife, because of it's narrow design. Another amazing design and knife, but does raise eyebrows when opened in front of non knife people. Since I don't usually worry about what others think, it is fun to watch facial expressions when it comes out ( but always respectful of laws, safety, and personal property).
A couple more options with similar blade lengths, but very different grips. My personal favorite carry right now (although I change often), is the ZT0456. It is a real mitt-full, and feels just as solid. The other is the 0770CF. A little more to grip than the 0450, but super thin and light.
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