There's a distinction between a film being able to hold a long range of values due to compression ("minus" and/or compensating development with its inevitable compression of midtone microcontrast)
and a film which will actually carry a very wide range of values upon a relative straight part of the
curve. To my knowledge, the only current ultrafine-grained film which will do this is the now defunct
Efke 25 (about 12 stops). Otherwise, you're speaking about old-school thick-emulsion coarse films like Super-XX, Bergger 200, and Fomapan 200. I obviously have no idea of how the new film in question factors into this.