What's that got to do with it 
Can't you see the glaring mistake you've made? By inventing a green version you are suggesting that something is wrong with the original version ie. it may not be environmentally safe. Why not just sell the green anyway? You have inadvertently shot yourselves in the foot surely?
I'm glad your selling lots of bottles - you deserve it especially if you've all invested but be careful is all I'm saying.
Dave,
It's the same principle as having ecover soap. Why do some prefer ecover rather than fairy liquid? Or any Eco products in general?
Vision is perfectly safe in its diluted state, but in it's concentrated form you have to be careful (not to drink it or squirt it in your eyes etc) but the Eco version will be basically safe in all aspects.
As with many Eco products though, it doesn't perhaps have as much cleaning power to it as of yet, but it ticks the box of "Eco friendly" which some will prefer.
It's all about choice and compromise Dave.