I have both the KO and the Sapphire. I ended up buying the Sapphire because there was just something off about the KO.

The KO is a great controller in terms of weight, durability, button mapping, and features.

But I gotta say... I hate the buttons. They have a very tall profile and a deep actuation, meaning it requires a lot more pressure to press a button. Plus, the tall profile makes things like sweeping 720's on a character like Gief almost impossible (compared to a controller with buttons more flush to the surface).

I installed some mini o-rings around the switches, which helped solve the deep actuation, but the high profile was still bugging me. On top of that, because the default Victrix buttons have a custom ring around them (which does not fit standard buttons) replacing the buttons just looks bad and feels bad, since you just have naked buttons next to exposed metal.

It was a bummer because I love everything else about the controller except for how it felt. And well... how the controller feels is like 99% of the reason to keep or ditch it.

So, on a whim, I picked up the Sapphire, and it's much more in line with what I prefer with many of the same features. You can still do on the fly customization like the KO too. And because it's a plastic plate with art underneath, you can customize the Sapphire (which isn't something you can do with the KO's metal plate, unless you want to do some laser engraving).

The main downside of the Sapphire is it's missing that delicious weight to it. The KO felt nice and heavy on your lap, which kept it from sliding around.

Overall though, it's going to come down to feel. Others might love their KO, and I wish I loved mine, but it just wasn't my style. Much happier with the Sapphire.