I currently own a G10 harpy, and used to have a lightweight native (until it up and jumped out of my pocket).
They're two completely different knives.
The native has a great grip, a useful blade shape, and is alot of knife packed into a small package. The new blade steel is terrific. Also, it has a reversable clip, so you could carry it left handed. I didn't like the native as much as my other spyderco's, because I found the posistion of the hole difficult to open. I like the pronounced hump on the delica's/other spydercos much more.
The harpy is also a cool knife. I believe in the movie hanibal, they use a plain edge G10 harpy, which is supposedly getting to be rare. I have a serrated G10 harpy, which I like alot. Its a very tiny knife, almost identical to my spyderco standard when closed. The hole on the harpy is a little bigger looking, though. The harpy is very smooth opening, and makes it easy to do the "spyderco drop" with. The harpy works great for cutting rope, and for opening boxes. However, its a pretty sick looking blade, and more than a little likely to scare the sheeple (if you don't conceal it with a finger over the blade). I'd love to see a version of the harpy with a compression lock. (I know its not going to happen, but, the compression lock is soooo cool).
Overall, they're two very different knives. I'd have to say I like the harpy more than I liked the native, although a lot of people are big fans of the native. I believe you should be able to find the native for a cheaper price, and the new steel on the native is better (in my opinion) than the steel on the harpy (ats-55). It depends on how you want to use the knife, where you want to use the knife (in public?) and personal preference.
Go with whichever one you like better.
Or, better yet, go with both.
-- Rob
