假设我们有两个对象数组oldArr和newArr。我们可以编写以下函数来比较它们并返回新的不同对象数组。

function compareArrayObjects(oldArr, newArr) {
  let resultArr = [];
  newArr.forEach(function(newObj) {
    let matchedObj = oldArr.find(function(oldObj) {
      return oldObj.id === newObj.id;
    });

    if (!matchedObj) {
      resultArr.push(newObj);
    } else {
      // Compare properties of two objects
      let isDifferent = Object.keys(newObj).some(function(key) {
        return newObj[key] !== matchedObj[key];
      });

      if (isDifferent) {
        resultArr.push(newObj);
      }
    }
  });

  return resultArr;
}

以上函数会遍历newArr并查找与oldArr的匹配项，然后比较两个对象的属性值。如果newArr中的对象是新的或不同于旧对象，则将其添加到结果数组中。

示例用法：

let oldArr = [
  { id: 1, name: "Alice", age: 25 },
  { id: 2, name: "Bob", age: 30 }
];

let newArr = [
  { id: 1, name: "Alice", age: 25 },
  { id: 2, name: "Bob", age: 30 },
  { id: 3, name: "Charlie", age: 35 },
  { id: 4, name: "David", age: 40 }
];

let resultArr = compareArrayObjects(oldArr, newArr);

console.log(resultArr);
// Output: [{ id: 3, name: "Charlie", age: 35}, { id: 4, name: "David", age: 40}]

以上代码将输出newArr中与oldArr不同或新增的对象。