ExFog is quite noisy. Supposedly it really affects ear pro with sound boosting.
With the AntiFog you can hear it if you're in a place where it's dead silent and you've got to listen in for it.
I've seen a couple people with the Mask Solutions at sites, never asked them about it though.
But the...
I've only used the ExFog and Novritsch's AntiFog units, haven't tried the thermal lens yet.
The Novritsch unit works perfect for me even when it's freezing outside. I've gotten a couple mates into it as well and none of us have had any issues with them yet.
For me (and I sweat a decent amount) I...