It depends on what aspect you’re looking at. If you want a striker who’s going to burn past defenders and leave them in the dust, your gonna want nunez to be your striker. However if you want a more technical striker who will do more dribbling and passing, you’d want Alvarez.

It’s hard to compare these two as they both have only had one year in the premier league and they both play in their own separate play styles. In a year or two this will definitely be a discussion but atm, imho, it’s too soon to say.