Well they are in that they are both controller interpreted. The major difference is that a controller providing an SRA has you identified on radar and can see your radar return all the way through the approach. A controller providing a QGH may not have this luxury and can only see an indication from where your RT transmission is coming from on a VDF style display. With a guestimate of the varying wind conditions as you descend, plus judicious use of a stopwatch to time the various legs of the procedure, the controller positions the aircraft onto final approach by issuing frequent heading changes. The controller cannot see the aircraft's radar return at any point during the procedure. This is reflected in the comparatively higher minima used and obviously means little info on other traffic can be passed.
I used to do them at Netheravon; the places where they are available to civil pilots are fewer in number all the time. Get one in while you can!
PS Tinstaafl it you still operate thru Scatsta come up to the tower and say hello!