Vivo is far superior.
They make all their own pasta and sauces, Mamma Della and Bice for that matter both tasted very artificial to us, almost like Olive Garden which we didn`t like either.
Vivo just seems to be of a consistently high standard and we`ve never been disappointed with any dish there, and I don`t really like Italian food, I rarely eat pasta but we do enjoy all our visits there.