On Saturday, August 8, 2020 at 7:49:02 PM UTC-7, wrote:
Which vario has lowest latency? (Least delay to indicate thermal we pass)

Anyone has done side by side tests?

S
The Air Avionics (Butterfly) vario has inertially derived vertical air mass movement. This is nearly instant, the indicator moves perhaps 1/10 of a second after your butt. It leads the barometric needle (both it's own, and the two other variometers in my panel) by over a second, and I have them set to the lowest time constant.