I dress to ride not to crash, on account of doing more of the former. Seeing a hazard and reacting, being comfortable and therefore awake, not having your own smoke screen inside the lid (misting), making eye contact with the other drivers (rather than looking like a Dr. Who extra) all have their advantages and real world uses. Avoid the battle rather than wear the armour IMHO.

Yes, if you slide on your face at something like 35 mph you will be better with whatever Mr. Rossi is wearing this season, but don't live in the dream world of "I'm wearing £1000 worth of polystyrene and nylon weave and am safe". Any helmet is the 80% factor in not getting killed in a crash, the other features give 5-10% either way. Of course if the better protection is just as comfortable wear it.

Somewhere soon, someone who maybe feels guilty/smug for spending £700 on a Shoei is going to post a picture of a chap with no nose. This (in)famous picture is from a speedway track, so while it makes the point about the protection, it doesn't make the case against the vision/weight/comfort advantages of an open face on the road. There is no right answer. Go with what you are comfortable with.

Personally I wear a flip front Schuberth on the motorway, a Roof that can be worn open or closed for my commute and an open face for the city. When they invent a helmet

Andy