V1 is a decision speed, or simply go/no go. And stop in the remaining runway.
VR is a speed where rotation occurs to reach V2 as the aircraft lifts off the runway. On larger aircraft it is usually something close to three seconds from VR to V2.
With straight wing aircraft VR and V2 are usually very close or identical. The greater the wing sweep will usually produce a greater difference between VR and V2.
Just mudding the water.....