I have never taken one apart, but I would say it is a lot more intense of a design than just a "SR9 2.0". Owning a few SR series and have fired an AMerican pistol, I'd say they handle very differently. Triggers, grips, sights, and disassembly all are very different.
It might borrow the basics from striker plastic pistols of today, but it has a removable chassis and fire control group similar to the SIG P320. I don't know if it is swappable like the SIG, but it has it.