I think it varies by county and most certainly the name of such roles varies.I'm a but confused about the whole 'Super Mentor' thing. I am a Mentor & an Observer myself, and as a Mentor I would never have so much influence? I am asked by RDO to go and Mentor new referees, and I'm there mainly to encourage & show the referee the ropes. Maybe a couple of bits of development, but as new referees, it's just about helping them through the first few games.
I wouldn't be involved in any promotion process, and any questions asked of me by a referee I would advise, but ultimately recommend they contact the RDO.
Here in Cornwall the RDO has a team of volunteer roles that report into him. For this the relevant people are the new referee co-ordinator whom oversees appointment of mentors to our new referees and is an additional point of contact for support help and guidance. And the progression co-ordinator who appoints matchday coaches and observers and provides a level of assurance for reports submitted to ensure consistency in advice.
I imagine the super mentor holds a similar type role but is being presented to us as though he is taken this role on with bit of a power trip (perhaps the word super in his title doesn't help).