I have both.
Absolutely love the Hairy Balls.
A sharp fuzz that at the same time keeps the low end very well.
You can tell it was designed by a bassist.
And not just any bassist:
Jan Detremerie, or
Big John, he is a member here.
A well known professional bassist in our Belgian musician world.
Great guy all around.
Only now do I start to learn how to play with the gate on the fuzz.
Boost function is also great. But more for recording IME.
Go with the boost at 3'o'clock and directly into a DI.
Does a nice growl then. (I compare it to GK growl and Mesa 400+ growl.)
The fuzz is very simple... no gain control.
The gate is what makes it not a one-trick-pony.
The Grannypuker is not working out for me.
I'll give it another chance when I have my new rig togheter. It seems that it doesn't like my Line6 POD X3.
Maybe it's not the right pedal for me... I was meaning to ask Jan more about this but haven't got around to it. (Too busy at my job.)
In the meantime if Jan checks in: advice on settings for deep synthesizer-like sound please.
I look forward when he brings out his next pedal.