Just my tuppence worth.
From a line maintenance point of view the RR has always been easier to service. The gearbox is on the fan case with all the accessories. Starter motor, IDG, Fuel and oil pump packs etc. Access is simple, just open the fan cowl and away you go. The GE and PW philosophy was to cram as much as possible around the hot core section which means you need a pump to open the C Ducts/ Thrust Reverser halves. More time consuming and in my opinion more difficult access.
The GE CF6 is a brilliant bit of kit though. Incredibly reliable.