True to previous discussion, the Panthera is essentially a FightStick Pro version of the Atrox, with a top plate that cannot be non-destructively modded. I copped one off the CES Appreciation Sale, and was interested to see the differences between it and the XB1 Atrox (which already fixed a ton of shit in the problematic 360 version).
Basic pics:

Packing is WAY better. More plastic covers – it wouldn’t have surprised me if the Atrox was getting scuffed a bit in shipping.

Top panel is still a fingerprint magnet. No top facing-screws. The whole thing is essentially glued and sealed together, and the top plexi looks noticeably thinner. This means the artwork is closer to the surface and shines through a bit better, but also that it can never be changed. For comparison, here’s the XB1 Atrox:

Removable screws, but faded artwork because of the thicker plexi.

At first glance, looks like the same updated internals the XB1 Atrox had. Updated hinge attachment, a bit of reinforcement on the sides (not enough, imho), new/same cable connector. Screws holding in the metal plate are still in the same place… but buried under the sealed/glued top plate. gg Razer.
You can still get this thing to creak by pressing down on it. It’s somewhat better due to the revised top panel, but the real criminal all along has been those too-thin sides and no structural reinforcement in the middle.
Button clearance to the utility panel is thankfully not as tight as it is on the TE-S+, but I still think we’ll look back at these sticks in 10 years and find those things to be gaudy, stupid and unnecessary. I much prefer Hori’s approach in that regard.
It’s a good stick and I’ll probably keep it (I sold my two XB1 Atroxes to @nsdothack last year, who promptly quad-modded them), but it’s very clear this is an out-of-the-box controller and not an ideal mod project. I guess you can still easily add LEDs?