I have both Muta Jovis and Mutes,
Both will cause pitch droop. I purchased a WMD SL3kt to get around this.
My Muta Jovis has malfunctioned on me once, but the people at NE replaced it. Still a bummer, and I don't feel the Jovis is built very well.
I love my Mutes. It is built using vactrols for click-free switching. There is a nice decay of whatever signal that running through it that can add interest to the modulation, or a nice roll-off to audio. Mutes also has both momentary and latched behavior and the switches are high quality.
Both have inputs that are are normalized to the outputs below for multing signals.
Mutes is far superior in my opinion.