async.eachSeries是否作为同步数组迭代工作？(它实际上等待响应)

我问这些是因为它们都有回调但async.each就像异步数组迭代一样对ex：

//This is traditional way to iterate an array with callback functions in node.js
//Is this same with async.each ? i want to know it actually.

for (var i = 0; i < data.length; i++) {
 (function (i) {
  request(data[i],function(body){
   console.log(body)
  });
 })(i);

//if this codes and async.each are doing same things,//i know that async gives me an aert when all finished thats the difference.