I use the (original) Decimator pedal straight after my always on pedals, pre-boost & pre-Kemper
It's completely silent if set right, I can play quiet without any gate-breathing, and no noise when I'm not
It is better IMO, I love it
I use the Kemper gate to take out any amp noise from gainy profiles, set to just enough
Works for me (had 2 of them for 20+ years now)
Back in my band days playing high gain amps, I had it in the fx loop of my Diezel, post -preamp & pre-fx
I prefer having 2 though, 1 in front and one in the loop (or the Kemper)