I fly EPR and N1 on the 330, 346 and 343... You can fly with both of them, but I prefer N1 WAY over EPR, mostly due to the fact that EPR is non-linear, and especially at lower powersettings a millimeter of lever-change quite a thrust change. Which, according to Airbus, should be not true. But it is.
Most of my colleages, including me, fly EPR-engines by the still available N1-gauges.
P77