Let me make sure I've got this right...

Black barathea Argyll= FORMAL day wear
PC (regardless of color)= evening wear

So, as I only own these two jackets, I guess I'll be wearing the black barathea Argyll to the morning wedding this Saturday.

As long as I'm asking questions, I've got a couple more for you...

When would a BLUE PC be appropriate?
If I ever end up going to a formal/black tie event, which would be more appropriate, the black barathea Argyll, or the blue PC?