Symantec Endpoint Protection 12.1 Porsche and Ferrari?

While checking for new products in the catalog on my LiveUpdate Administrator server I came across three (new to me) items:

1) Symantec Endpoint Protection 12.1 RU5 -> which I understand may be coming in August or September.

and

2) Symantec Endpoint Protection 12.1 Porsche

and

3) Symantec Endpoint Protection 12.1 Ferrari

Can anyone tell me what Porsche and Ferrari are in relation to the current SEP versioning? Are Porsche and Ferrari full RU's (RU6 and RU7), or possibly MP's of RU5? I know this is not a critical thing, I was just curious as I have never noticed build "names" before.

Thanks,

-Mike