In our fleet we have both RB211's and GE's. From an operators point of view, I would go with GE. The GE's virtually have no quirks. The RB's require continious ignition more than the Ge's, and they are more prone to hot starts. However, the RB's are slightly more powerful than the GE's, and they burn less fuel (4% LESS!). But still, as a operator in our fleet. GE rules.