Nowadays 'grace' is not so much mentioned, but the benefit (necessity even) of hearing Maharaji speak is to become 'inspired' by him; he is billed now as an 'inspirational speaker'. As I see it, the new inspiration and the old grace are interchangeable, even synonymous:

1) They both come from Maharaji directly, and only from him; you cannot obtain them other than through him.

2) You can only be fully wired up to receive them if you get the Knowledge in an approved Knowledge session (initiation).

3) You still need to do 'satsang' (listen to Maharaji), service ('help out') and meditation to understand and benefit from inspiration and/or grace.