Difference between VR1 vs VR2 is one stop. Only you can determine the value of that in your work. Personally, if I were using both (and I have) side by side on a tripod/gimbal, I would be hard pressed to pick what photo was taken with VR1 vs VR2. Where I noticed a difference was with TCs - the VR2 just seemed to be a bit sharper with he 1.4 TC. The TC2.0 III was released at the same time and pairs well with the VR2 model, and this combo outperforms the previous generations combo. I opted for the VR2 because the 1.4 TC lives on this lens and the 2.0 III performs well I a pinch.