LOL! I drove by Mangia yesterday and was going to post the same question.
I ate at La Scala a couple of times and found it to be pretty good. However, friends told me it had gone downhill in the last couple of years and just couldn't compete with all the other Italian restaurants in Somerville.
One thing I found odd is that the old La Scala sign is still prominently displayed on the front of the building where Mangia is located. I wonder if this means ownership has not changed.
I really hope someone answers your question(s) and that the comments are positive!