We were told that the "E" RFM doesn't allow you to put off fuel pumps in case of a double generator failure, but the S manual does.
The 'S' drill actions
require you to switch off the fuel pumps, rather than allowing it to be done; obviously it's to load shed the battery a little better following a double genny failure, to get the advertised 49 minutes of battery capacity. Maybe the engine suction pumps are more efficient/reliable on the S so the chances of a flameout are reduced? Don't know the answer to that - they're probably the same pump!