Just went through this exact issue as i wanted two burners with my gas cooktop. I was going to put in two induction burners next to the wolf but the hood would not cover it and the code won't permit it. In other words you would have to move the induction to another area and have a separate hood or downdraft unit. i ditched the induction and went for the gas cooktop from Wolf. Love it. Also did a Subzero counter depth refrigerator and went with freezer drawers elsewhere in the kitchen. So what I am told, you make the decision to go all induction or all gas because in the US there are no good hybrids. In our area induction is not good for resale, but gas is.

I am not sure about the Bertazzoni induction but I love my Bertazzoni gas range. I also would probably not do a mixed one in one appliance but I have an induction burner that I use for sauces but the rest of my cooking I still like gas better .