Not sure about his mobility and striking of the ball, he seems cumbersome. And a lot of his goals, like Giroud, are first time finishes in the box and headers.
He would be ok as a backup striker, but then is that worth it considering he is a slight improvement on Giroud, would cost 20m+ and would have to be convinced to swap Chelsea's bench for ours. And we would still have to buy a first choice striker.