It depends on what you want.
console.log("story "+name+" story")
will concatenate the strings together and print that. For me, I use this because it is easier to see what is going on.
Using console.log("story",name,"story")
is similar to concatenation however, it seems to run something like this:
var text = ["story", name, "story"];
console.log(text.join(" "));
This is pushing all of the items in the array together, separated by a space: .join(" ")