How much is the illusion of safety to you is the real question. If I get broadsided at 50 or hit a fixed object at 50 its closed vs. open casket as the more valid question.
Just because a company chooses not to pay Snell and donate their product for testing with that check doesn't mean it doesn't meet Snell. It means exactly what it is. Not Snell tested. Somehow that becomes flawed logic meaning not safe.