no swatches to offer, but IMO they look absolutely nothing alike. On me at least, Moth Brown is very nearly gray. Like a charcoal mixed with a bit of plum-ish brown, very cool toned and fairly dark. Blue brown pigment is MUCH warmer and lighter, having an almost ruddy/burgundy tone to the brown (enough so that I often use it as a lip color!). It would almost reminds me of red clay if it weren't for the obvious blue shimmer which is on the tealy side. Moth Brown is shimmery, and you might say it has blue undertones, but it's not obvious while the blue in blue brown definitely can be if you use it wet or pack it on.