The Suomy visor has a safety latch on the side, similar to the latch used on Arai helmets. This one is easier to use because it has enough grip to hold the visor but doesn't require the greater force of the Arai system. Pulling on the Arai latch moves the entire helmet and is annoying.
The breath guard on the Suomy Extreme fits more precisely than the breath guard on the AGV Ti-Tech, but it still doesn't fit perfectly at the outer edges, as seen in the photo. This is a disappointment on a helmet costing as much as the Extreme. Unfortunately, we have yet to see a breath guard that fits correctly on any full-face helmet at any price.