Depends on your driving skills. 20/126 would be a little slower as the road is very curvy.
97/58 as I remember it, has less curves and slightly higher speed.
If you have never been to Crater Lake, 97/58 would give you a good choice to enter from thenorth and visit there.
Bud
USAF Retired
Pace Arrow
2003 Chev Ice Road Tracker