I don't know the VOs. I like the SKS a lot. I am just using their road width ones so far. I will now steer away from Planet Bike ones because I find that if I put real flaps on the front fender, ie flaps deep enough to really stop water, I cannot stop the vibration. I believe this is becasue they only use one set of front stays and the bracket at the fork crown is attached on the underside and passes through a hole in the vender, making less than rigid at the only secure fastening to the frame. I have pop riveted in reinforcing plates (on their wide, relatively stiff hybrid fender) which help a lot, but still is not as good as an unmodified SKS.
I have replaced all of my Planet Bike road fenders except on my workhorse fixie with SKS. My two bikes with hybrid fenders are liveable but I would not go Planet Bike again. The workhorse is still PB just because it is road width and white, making a rare (and valuable) item for those of us who prefer not to become road kill.
Ben