diff --git a/lib/discrepances.js b/lib/discrepances.js
index 1ad21fc..07d53a7 100644
--- a/lib/discrepances.js
+++ b/lib/discrepances.js
@@ -30,6 +30,7 @@ var bestGlobals = require('best-globals');
 var datetime = bestGlobals.datetime;
 var timeInterval = bestGlobals.timeInterval;
 var constructorName = bestGlobals.constructorName;
+var changing = bestGlobals.changing;
 
 function getType(variable) {
     if(null === variable) { return 'null'; }    
@@ -49,8 +50,6 @@ function compare(resultArray, a, b, index) {
     resultArray.push(diff || null);
 }
 
-function setIfDiff(obj, key, val) { if(val) { obj[key] = val; } }
-
 function timeStr(dt) { return datetime(dt).toYmdHmsM().substr(11); }
 
 function compareStrings(a,b) {
@@ -120,16 +119,36 @@ function compareDates(a, b) {
     return {difference:res.join(''), values:[a,b]};
 }
 
+function setIfDiff(obj, key, val) { if(val) { obj[key] = val; } }
+
+// function compareOrdered(aKeys, )
 function compareObjects(a, b, opts) {
     var rv = {};
     var aKeys = Object.keys(a);
     var bKeys = Object.keys(b);
-    aKeys.forEach(function(key) { 
-        setIfDiff(rv, key, !(key in b) ? {onlyLeft:a[key]} : discrepances(a[key], b[key]));
-    });  
-    bKeys.forEach(function(key) {
-        setIfDiff(rv, key, !(key in a) ? {onlyRight:b[key]} : discrepances(a[key], b[key]));
-    });
+    if(opts.unordered) {
+        aKeys.forEach(function(key) { 
+            setIfDiff(rv, key, !(key in b) ? {onlyLeft:a[key]} : discrepances(a[key], b[key]));
+        });  
+        bKeys.forEach(function(key) {
+            setIfDiff(rv, key, !(key in a) ? {onlyRight:b[key]} : discrepances(a[key], b[key]));
+        });        
+    } else {
+        var diffs = [], keys=[], values=[];
+        aKeys.forEach(function(key,index) {
+            var bKey = bKeys[index];
+            if(key !== bKey) {
+                diffs.push(index);
+                keys.push([key, bKey]);
+                values.push(discrepances(a[key], b[bKey]));
+            }
+        });
+        if(diffs.length) {
+            rv.differences = diffs;
+            rv.keys  = keys;
+            rv.values = values;
+        }
+    }
     return Object.keys(rv).length ?  {object:rv} : null;
 }
 
@@ -138,7 +157,7 @@ function isSimpleValue(classType) {
 }
 
 discrepances = function discrepances(a, b, opts){
-    var opts = opts || {};
+    var opts = changing({unordered:true}, opts||{});
     if(a === b){ return null; }
     var typeA = getType(a);
     var typeB = getType(b);
diff --git a/test/test.js b/test/test.js
index 07142bc..8656076 100644
--- a/test/test.js
+++ b/test/test.js
@@ -49,13 +49,23 @@ describe("discrepances", function(){
         {a: undefined                       , b:false                           , expect:{types:['undefined'  , 'boolean'], values:[undefined, false]   }},
         {a: new Example({uno:1})            , b: new Example({uno:1})           , expect: null },
         {a: new Example({uno:1})            , b: {uno:1}                        , expect: {classes:['Example', 'Object'] } },
-        {a: new Example({uno:1})            , b: new Example({uno:2})           , expect: {"object":{"uno":discrepances(1,2)}} },
+        {a: new Example({uno:1})            , b: new Example({uno:2})           , expect: {object:{"uno":discrepances(1,2)}} },
         {a: {0:1, length:1}                 , b: {0:1,1:2,length:2}             , expect:{object:{1:{onlyRight:2}, length:discrepances(1,2)}}},
-        {a: {last:'Simpson', name:'Bart'}   , b:{last:'Simpson', name:'Lisa'}   , expect:{"object":{"name":discrepances("Bart","Lisa")}} },
-        {a: {name:'Hommer', last:'Simpson'} , b:{last:'Simpson', name:'Hommer'} , expect:null, opts:{unordered:true}},
-        //{a: {name:'Hommer', last:'Simpson'} , b:{last:'Simpson', name:'Hommer'} , expect:{differences:} },
-        {a: {name:'Hommer', age:40}         , b:{name:'Hommer'}                 , expect:{"object":{"age":{"onlyLeft":40}}}},
-        {a: {name:'Hommer'}                 , b:{name:'Hommer', age:40}         , expect:{"object":{"age":{"onlyRight":40}}}},
+        {a: {last:'Simpson', name:'Bart'}   , b:{last:'Simpson', name:'Lisa'}   , expect:{object:{"name":discrepances("Bart","Lisa")}} },
+        {a: {name:'Hommer', last:'Simpson'} , b:{last:'Simpson', name:'Hommer'} , expect:null},
+        {   a:{one:'un', two:'dos'},
+            b:{two:'dos', one:'un'},
+            expect:{
+                object:{
+                    differences:[0,1],
+                    keys:[['one','two'] , ['two','one']],
+                    values:[discrepances('un','dos'), discrepances('dos','un')]
+                }
+            },
+            opts:{unordered:false}
+        },
+        {a: {name:'Hommer', age:40}         , b:{name:'Hommer'}                 , expect:{object:{"age":{"onlyLeft":40}}}},
+        {a: {name:'Hommer'}                 , b:{name:'Hommer', age:40}         , expect:{object:{"age":{"onlyRight":40}}}},
     ];
     // esto es para evitar que values:[] tenga fechas distintas a 'a' y 'b'
     var dateFixtures = [