The contact lenses are closer to your eyes than the glasses. Yes ‘techhnically’ the difference becomes more negligible with lower diopters, but adding better optical clarity of contacts, more peripheral vision, you’ll tend to see better with lower equivalent diopters anyway.
Any cylinder below half diopter is common to be easily omitted.
For normalized, you might perhaps get two pairs. One night time / driving / full power, and one a bit lower to get you around 20/30 or so. Use either as needed. Also helps with conscious awareness of where your acuity is at in the moment, and choice to be made which diopters are necessary. 🙂