The Afwayu is not super bright. It has more extended highs, which translate as a sort of sparkle on top. It is actually pretty thick sounding. The mids are also thick, but the high mids do stand out a bit, and make for a nice singing quality. It has a beefy low and low mid sound, but the high mids and sparkle can make it sound tight. This pickup also has this slightly hollow crunch to it.
The Nailbomb has rolled-off highs, in comparison. It also has a good amount of mids with a thick quality to them. This pickup is very punchy, especially in the mids. In comparison to the Afwayu, it doesn't sing as much as it goes, THWACK.