Lorier stated that with the new Miyota movement the thickness will increase by 2mm. If you pre-order the first Hyperion II it will have the Soprod movement with a 2mm thinner case. For me this was an important feature.
See there statement below:
We are proud to formally introduce the Hyperion Series II. Yes, it's finally here!
With a new colorway, too—the Skyward Special Edition. Your requests for a white Hyperion have been answered!
Available Saturday, February 11, at 11 AM ET (UTC-5). Orders will ship the following week.
**This will be the only production run of Hyperion Series II to feature the Soprod C125 GMT movement. This summer, we will be transitioning to the new Miyota 9075, consistent with the rest of our collection. Though pricing is not finalized yet, the 9075 should make the Hyperion more affordable. But because it's a thicker movement, the future Hyperion will be about 2mm thicker (it will wear similarly to the Neptune). The design will be the same, so if the thinness of the Hyperion is a major draw for you, now is your chance!