Does Variance make a difference as well as Latency?

[jimship]

I have two Audio Interfaces: Steinberg UR22C and Focusrite Scarlett 2i2 3rd gen.

In the JamKazam audio setup test:

- Steinberg has 8.84 ms latency with 0.15 variance

- Focusrite has 7.58 ms latency with 0.28 variance

How important is the difference in Variance levels? Will one or the other device function better overall in JamKazam? Or is the lowest latency the only factor that needs to be considered in which device to use (Focusrite wins the latency test)?

Thanks!  - jim