Actually, patternless and blizzards can look really similar. I would say it is likely a patternless, but could still be a blizzard.
Blizzards are usually more uniform in their coloring, but it's no always the case. Blizzards also a lot of time have black eyes, and yours doesn't. So it *probably* is a patternless, but no one can say for sure that it is not a blizzard.