To compare two objects you can use:
angular.equals(obj1, obj2)
It does a deep comparison and does not depend on the order of the keys
See AngularJS DOCS and a little Demo
var obj1 = {
key1: "value1",
key2: "value2",
key3: {a: "aa", b: "bb"}
}
var obj2 = {
key2: "value2",
key1: "value1",
key3: {a: "aa", b: "bb"}
}
angular.equals(obj1, obj2) //<--- would return true