I hear more of a ramp from low mids to 4k that starts to really rise in the very high mids. Smiley face would sound clicky and disappear in a mix. The B3K does anything but that as it more "grinds" its' way through a mix. But yeah, the low-mids are not its' strong area.
Here's an example of how it cuts with my bass:
https://soundcloud.com/centaurus_a/3chordcrunch
And using the grind as an slight edge at the top of a rounder tone:
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Something in between those two:
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