Ocellaris clowns typically have 11 spines on top, but on some rare occurances will have 10 like a perc. And the black around the white markings are more pronounced on a perc. The semi Picasso name usually means the middle bar white and some of the tail bar run together, I have a semi Picasso that also does this. I'll try and get a pic tomorrow for you.
The middle marking of yours looks like a snowflake, along with not having much black around its bars.