The ZT 0566 cuts better than the Para 2, probably due to the thinner stock. Para 2 still cuts nicely however.
I have noticed that you can force some side play easily with Para 2's but I wouldn't call that blade play.
I don't mind the tip down orientation on the Military. I don't like the pocket clip positioning though. Too much of the handle sticks out of the pocket for me.
I got my 3.5 from Amazon Tuesday, but I exchanged it because the grind was very uneven. I got another today! This one seems better. The only quirks are a sticky lockbar and it looks like the lanyard hole wasn't punched out the entire way. Quick drop of blue lube smoothed the knife/lockbar up. No big...
I haven't tried s90v or 20cp. But I had the s110v Native 5 and the 204p Para 2.
I'm honestly fine with 204p/m390 I'd like to see these steels on more models.
I still need to try out the Techno. That's one of the few models I didn't try out at Blade just because I was too excited messing with the Domino/Para 2's