A differently sized, physically bigger transducer with different mesh stators using new manufacturing technologies like thermal bonding should give different sonic properties, so I would be surprised if it sounded similar.
Around 2017-2018, Stax had bought back at least two SR-Omegas, which are sitting at their headquarters. They might have a few more, might give a clue about the basis for construction and tuning, at least that's what I'm hoping / betting on, imho should be between 007 and 009 like the Omega.
Will be interesting to see impressions long-time 009/S users. If it is deemed to be much better, then it also puts past opinions into a different limelight.
It was the same with the 007 users switching to / adding in the 009 (and possibly switching back again) slightly different synergistic matches might provide some variables.