ID:
highest point: 12,662 ft (3,862 m)
lowest point: 710 ft (217 m)
11952 ft (3645 m) from being flat
CA:
highest point: 14,505 ft (4,421 m)
lowest point: -282 ft (-86 m)
14787 ft (4507 m) from being flat
On topic, CA is filthy rich (GDP larger than all but seven countries), has 13 naval bases, and outnumbers ID by 32,577,695 personnel.
Idaho has guns and isn't afraid of using them.
Idaho wins.
Heck, they should go for it.