Neither. I would take a BMW any day over these cars. If I was spending 50+ on a car I want it to look like it. I think the BMW's always do. IMO.
You can also get such a nice Honda Accord with all the bells and whistles and have change left. that would be my only choices.
But If I had to pick between these too.
I would go with the Audi A4 over a VW. Mainly because the CC is in its early stages and I don't think I want to be test pilot for VW nor do I think a VW worth 50 grand.