My current SportContact2s reached the end of their useful life recently, potential to be doing a few more miles in my car soon so decided to go with Goodyear EfficientGrip Performance to replace them, in preference to the high wearing / high resistance CSC2s or Dunlop SportMaxx instead.
Only had them a day and already amazed by the difference in noise, sooooo much quieter than the CSC2s.
Not expecting the grip levels to match up but then again, whilst an 'Efficient' tyre, they're also several years newer in design than the CSC2 so it may not be as pronounced as I think it will.
Intrigued as to whether i'll notice a difference in economy too, on a long trip the car will generally return 38/39 in normal driving, would be nice if the tyres can tip it to 40/41