The one on the left for us is the new guidemesh. I made the front much wider. Both these guidemeshes are also a newer version compared to last time. I removed the details on the side-windows. 

Here you see why I removed the details. The details deformed the shape of the roof

Without the details the roof is much smoother. I guess I forgot what I've learned at the start of the process. Don't add too much detail too soon!!