Airbus use optimised V-speeds, so its normal to see such a speed spread. Remember that Vr is the speed required to ensure that you achieve V2 at 35 feet. V1 in this case is the slowest V1 that you can have and still accelerate to Vr in the available distance. (Note if it wasn't limited by the VMCG, it might even be lower)
Gone are the days when the V1/VR ratio was a fixed ratio.
Mutt