[Overdrive]

So I've seen plenty of chatter about the spoiler that is on the pre-facelift BRZ/86/GT-86 as equipped pretty much everywhere but the U.S., where the FR-S got its own style of spoiler that doesn't have the little strakes (for lack of a better term) on the ends like the BRZ does. I'm curious to know, after trying to dig for it on my own unsuccessfully, if anyone has any knowledge or documented proof of whether or not the FR-S spoiler has the same functionality as the BRZ one, or if it ended up being something done for aesthetics and is just in the way of otherwise good airflow?

Not looking for any eyeballed opinions, really just trying to see if there is anything out there giving any proof of a drag improvement in the same way the BRZ spoiler is stated to do. I really can't find anything other than info on the BRZ one.