There isn't much info available on this yet, but from what I can tell, the "Reflected Sound Control" looks like it attempts to reduce the impact of early reflections. That is something no version of Audyssey attempts to do. RSC is also a multi-point measurement system with 8 measurement positions. I suppose they need that to do the "speaker angle measurements."
However, there is no information, (that I could find), on whether the YPAO aspect will EQ the bass. Previous iterations of YPAO have stopped EQing at 63 Hz. Audyssey XT32, and all versions of Audyssey above Audyssey 2EQ, will EQ the subwoofer channel to about 10 Hz, (depending on the capability of the subwoofer(s)). If YPAO with RSC does not improve on the bass EQ functionality of previous versions of YPAO, Audyssey will still have a HUGE advantage over YPAO, (IMO!)
Hopefully more information will become available soon on this.