What are your thoughts on the Pattada using teflon washers as opposed to PB washers?
Well the action is super good on my Pattada. Not that it is the safest thing to do but I can push the liner lock release and it drops like a rock.
BUT and that is a big but
The action of my Ouroboros which has teflon washers sucks. Well I have knives with much worse pivot performance, even with PB, so it isn't awful. Lets retract sucks and just call it slowish. At least it is consistently the same all the time where as I just bought a Benchmade Mini Griptillian and even though it has nice PB washers and I have loosened the pivot to have significant play it is an unpredictable pivot. Some times it drops shut and some times it hangs up there in the air and I have to touch it with my index finger or wipe it on the leg of my pants to close it.
Nah my Pattada could not be better action wise. Maybe you are thinking durability. I have had brand new teflon washers crack and split in a knife while I have it apart to fix a lock problem (Cold Steel Triad lock in a Holdout I). The knife still works fine; the action on those is pulling teeth anyway (but I love the knife anyway).
I suppose all things equal I prefer PB but it won't stop me from buying a knife as freekin' perfect FOR ME as the Pattada. The long roundish handle with the hook on the tail end . . . the long skinny blade that is plenty thin . . . wire clip that is so pocket friendly. Yes I HAD to have the Pattada. The only reason I held off a while was the talk of K390 steel which would have been over the moon great but the N690 actually satisfies me.
Hahaha I liked the knife so much I was planning to go to extremes to put some good steel in it. I won't elaborate but it involved scrounging some sort of long M4 blade and my TIG welder.

Fortunately I didn't have to get all Frankenstein. And the guys here will tell you I actually enjoy that sort of thing . . . I'm not proud.
The N690 steel is supposed to be comparable to VG-10, yes?
Well let me say I like VG-10. I have no problem with that stuff. For my money, and I only have this one example of N690, I would say N690 is a tad better.
For me, because I like this shape of knife as opposed to the slab sided wider knives like the Military, I was happy to pay the bucks for a superior user shape over all. The point is pretty narrow and somewhat vulnerable but I have a lot of use for a pointy knife.
Don't get me wrong the Military is a super knife and the one I have in M4 there is just no stopping it when it comes to a work knife. I just like what the round handle of the Pattada does for me because I can roll the knife in my grip and that adds versatility for the way I use the knife and it is still relatively slim in the pocket even though the handle has some thickness to it.
Getting back to the 710 I bet you are going to love it !
PS: take a lesson or two on touching up your knives with the Spyderco Ultra Fine Triangle rod. Hand held.
That will free you to be OK with getting your knives a little dulled from use and still be able to bring them back. Maybe a member here is near you and can help.
The rod isn't great for cheep stainless but for these better alloys it is extremely useful as long as you don't let the knife get too far from shave sharp. When I was done with this M4 blade it was hair whittling and going on to tree topping . . . even surprised me how much the M4 steel liked this triangle rod.
