500 can only perform LNAV RNP APCH.
The 600 is SBAS capable with different THALES FMS/GNSS units allowing LNAV, LNAV/VNAV, LPV and LP RNP APCH.
Not sure but I think the 600 can do RNP AR APCH. But no CAT III at the moment and no GLS.
Anyone know anymore on the 600?