2 months later, I feel I can give a fair impression of the Pro Team Winter Jacket. I actually ended up selling it.
There's no question that it's a lovely thing, really well made with taped seams and a nice fleeced inside. I just found that it wasn't as warm as the Pro Team Training Jacket, which felt better against the wind and cold. The Pro Team jacket was better suited to really hard efforts, and unless you were going at it, you'd get cold. So it didn't really feel suitable for any winter base miles.
I'm sure if you layered it a little more it'd be fine. I normally ride with a winter baselayer and just a jacket, which may have explained why I found it a bit cold. Having said that, I did find the training jacket just that bit warmer.