The Silktone Fuzz has been updated with a lot more available gain and some cool new features:​
tone controls - these are part of the cleanup circuit so they shape the tone before heading into the fuzz. The bass shape goes from a tight and forward sound when turned down to full and round when turned up. The treble shape subtly rolls off the high end for a softer fuzz tone. The shaping is much more apparent at cleaner settings too.
second footswitch - engages RAW mode bypassing the cleanup knob and tone controls to bring you back to full raw fuzz. This makes it a sort of dual fuzz to get a huge variety of sounds.
updated taper of the “Cleanup” control is much smoother compared to the old version and the “Fuzz” control is much more usable now too allowing you to set post gain and shape the sound a bit or to set max fuzz level when cleanup is bypassed in raw mode.
higher output volume than the original fuzz so it can be used to hit your amp harder whether in full fuzz or when cleaned up as a colorful germanium boost.
updated power supply so the Fuzz+ can accept any 9V DC power source (center negative) and can be daisy chained with other pedals. An isolated power supply is no longer required.

https://www.silktone.org/store/p20/fuzzplus.html