Transitions Vantage or Xtractive?

Neither one. Both are activated by UV light and most UV light is blocked by a car's metal and windshield. That means neither one will get dark inside the car. I warn my patients of this whenever I sell transition lenses. Transitions Vantage will only have full polarizing effect in bright sunlight when the lenses turn dark. On a cloudy day, they will have very little polarizing effect. If you want dark glasses for driving then get Transitions drivers lenses (but these will stay dark even on cloudy days). But, if you want good sunglass lenses for driving, nothing beats polarized lenses.

And, On Edit, both the Vantage and Xtractive lenses will not completely turn clear even indoors, so it will always look like you have a tint on the lens, even in low light situations.

Transition Xtractive

Xtractive will get moderately dark whie driving. Vantage does not. Vantage products are geared more for outdoor sunglass. Xtractive also gets darker than standard transition lenses Go with xtractive

Neither.

Ed said whatever I wanted to say