As part of my ongoing waffling over front engine V-12s, I wonder what people see as the pros and cons of these two cars. I have heard the C4s are hard and expensive to service. Th epower is supposedly the same on the cars and the C4 has a sportier cut to its jib with the tiny rear seat that folds down into a storage space. I know of a couple of good looking 2+2s for sale through vendors and 3 are up for sale (all red) at that Barrett Jackson. Autosport Design has a nice C4 but is asking way too much for it.