For sizing sake, I normally wear a 32 rivet, which fits perfectly as a chino except for a slightly large waist. The Wilshire fits tighter on the thigh but by no means skinny jeans tight. Also, the waist measurement is larger on the Wilshire, but that doesn't seem to translate to a larger waist in practice. I think because of the slightly lower rise the waist seems identical if not slightly tighter than the rivets.
Long story short, order your rivet size and you should get a very good jeans fit. I'm very happy.