I assume that the developers are focusing on the stealthiness of the coating as the geometry does not strike me as especially stealthy with regards to radar cross-section.
"Stealth" just a "catch word" .. no such thing as "stealth".
Serbians shot down "a few" American "stealth" fighter jets Clinton time, Iranians landed CIA "stealth" drone flying deep into Iran, "intact" (Iran was following the CIA drone already over US Afghan base).
Why all this ? ?
Reason is, Jet fighters, in a fight against a modern "enemy" are worthless .. now, anti aircraft missiles can shoot any fighter from 100s of miles away .. Russia SS-500 (the latest version) can shoot down "everything", no ifs and buts.
Jet fighters (or bombers) only viable against 3rd world opponents .. Like Russia fighting ISIS or Americans bombing Libya or Saddam or Israeli dropping bomb on Gaza woman and Children .. Russian SS-400 Batteries in Syria can shoot down even a "pigeon" before taking off from any point in Israel.
Same with American and Chinese systems.