I drooled over the PE1 for months in catalogs. Then I got the chance to handle one in a knife store and immediately knew it wasn't a knife for me. It felt terrible. Someone said "like a stick" that's about it. Then the PE2 came out, and I thought, "maybe that one," nope. I guess the arc lock is strong, but the knife feels awful. Do yourself a favor, if you're planning on buying one, hold one first. Handle is anything but ergonomic. And the Zytel on them is so rough that I'd bet it would tear your pocket up more than the Sifu's G-10. I was worried that the Sifu would be way too big for my relatively small hands, as the carnivore is, but the Sifu felt perfect in my hands. IMO it's no competition. YMMV, but, especially if you're buying sight unseen, go with the Sifu.
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Jason aka medusaoblongata
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"I have often laughed at the weaklings who call themselves kind because they have no claws"
- Zarathustra