Having been to both with the Baggies I have to say the old one. It had an imposing feeling of awe about it. A legendary place.
The new stadium is just another modern football ground. It's like a goldfish bowl.
Going there's not the same either. A club had two chances of playing there a year. F A Cup and League Cup. Now semi's are played there and the ground is hired out to London clubs while their grounds are being redeveloped.
The magic and mystique of the place are gone.