I bought 3 identical orange Opto Pures for testing, and they are just spooky straight. I was practicing some 200' approach shots in the field, and I kept thinking I must have flipped it over a little bit, cause it was just landing completely flat. After a bunch of throws, I realized that these things will hardly move left at all unless I put some hyzer on them.
To get a perfectly straight flight at full power, I have to add a little hyzer, or they will track right. They just don't fade. Anodes clearly outperform them in the hyzer department. I can get better and more consistent movement to the left with an Anode. I have been throwing Rhynos lately, so I'll try a Pure/Rhyno setup for a bit, and see how much I miss Anodes. They had a lot of flash on them when I got them, and I deflashed them before I threw them, so I expect they would have been a little more stable out of the box.
Definitely uncertain if they'll knock Anodes or not. I resist constantly changing my bag just because another good disc came out. I may simply not need them. If I imagine myself carrying both, I feel like I'll be reaching for the Anode more often than not. They feel a little more trustworthy. Recommend these new Pures though. They fly well, feel good in the hand (after deflashing), and come in my favorite plastic.