"By their deeds you shall know them".
Those seeking truth without seeking fortune, popularity, fame, accolades, relief from guilt of sin...….. will find truth and spiritual success in themselves and their children (their deeds), that is the sign I look for in groups like Novus Ordo, Indult, Fraternity, SSPX, Sedes.
The success % in the Novus Ordo is atrocious, like maybe 1%
The success in the Indult and Fraternity was considerable less than in the SSPX, but the SSPX today is going the way of the Fraternity, in a few years there will be no difference.
The success of the SSPX is less than the Sede groups.