This. I've had every pair tailored through the leg and it's great - kinda nice to dial in the exact leg that works for you. Wearing a slimmed Walt chino (khaki regiment twill) today in fact - shape works better on me than the Rivet.
I also have both (and like both!) - if I could only pick one, it'd be the birdseye. The fabric is really nice and super versatile. The chessboard definitely feels more casual/rustic and the contrast makes it feel more "patterned" - there's also a tiny bit of brown in there, so it does go really nice with brown/olive tones up top.