Thank you this is helpful. I own the 622B, and had an audition of the Storm. Would love to hear them closer in time to draw a better comparison.
I find the 622B have a pretty vast soundstage per my notes, which is really cool. To your point, almost like an high end open back headphone. I think the tuning of the 622B is a pretty "reference" tuning, and definitely not a "fun style" tuning. In fact, the charts would show the 622B, and Storm have a really similar approach to midrange. Per my notes on the Storm, I think the treble of the Storm sounds a bit more "open" and "authoritative". Bass-wise, again per notes, I think they're pretty close. They have a different take though. So, Storm with a custom BA-bass, and 622B with a BA-bass with BC. Both I would consider to have excellent bass, with the 622B having a bit more subbass, and the Storm having a bit more texture, and detail in the bass. Coherecy-wise my notes would tell me they both have great crossover design, with the Storm being just a bit better from mids into treble.
That said, I still need to be able to switch back and forth between them. I also listen to the 622B on an RS8, and heard the Storm on a DX320Max fwiw.