Both pants are very well made (as expected from Patagonia and Crye Precision).

Notable differences:

Knee pads: The Patagonia VIKP knee pads utilize “pull the dot” snaps which basically means you can only snap and unsnap them via a single direction. This helps prevent unwanted pad removal. The Crye Airflex slip into place and uses Velcro to secure. I find the VIKPs to be more comfortable and less cumbersome.

No rear pockets on the Patagonia pants. This forces you to carry your wallet in the front pockets. No adjustable waist and inseam on the Patagonia either. You will also find that the Patagonias (annoyingly) have a button fly. Easy to undo but a pain in the ass to rebutton especially with a Velcro waistband. Crye uses a Velcro waistband but with a zippered fly.

Overall fit and sizing:

Both pants are “high waisted” which basically means you don’t sag like casual pants, some people aren’t used to wearing pants properly so it may come to a surprise. The Patagonias are much more true to size and I believe fit better.

Below left to right, Kitanica Backcountry pants, Patagonia Level 9 Temperate Pant and Crye Precision G3 Combat Pant. All pictured in Ranger Green. Noticed they all vary in color.