I saw that this morning. I just bought the DJI version only because I had a coupon and credit to use up. But the third party version looks nice also. I'm going to Oahu in August so I'll test out the DJI housing, and if it doesn't live up to the hype then I'll probably buy the third party version also.
It would be interesting to see the quality from both. It's not glass for sure for 3rd party, not sure about DJI case so there will be impact on quality.
The 3rd party one does not limit the movement of camera, there is still chance to operate in full "hemisphere" while original one does limit field of gimbal operation (hence special mode for that, built into the software).
Got it DHL just now. It's a REALLY snug fit to get the Osmo Pocket in it. The little rubber ring/gasket falls out easily. Might have to glue it down so I don't lose it. And the unit is heavy when put together, but has a slight amount of buoyancy when I threw it in my sink full of water. I'm wondering if the 3rd party housing has TOO much air in it and would be hard to dive with. But the picture quality is nice when submerged. Very clear. And the buttons feel nice. Will try to get it to the lake or pool soon to do a full review.