In which way does it work the opposite to vision please do explane as you are the Vision expert. I don`t quite understand what you mean.
The product you seemed to think vision was is a nanotechnology coating, (similar to others) and once it's applied it makes glass hydrophobic and water hating.
Vision has the opposite effect. Over time many hydrophobic windows become more hydrophilic, and this can make the final rinse easier.
Don't quote me on this but I also think that nano coatings dont give any extra cleaning power, they just leave a decent shine and make things water repellant, by leaving a coating behind.
I've tried them in the past but didn't like them atall for the window cleaning purpose to be honest.