JQ时间比较，为什么不相等？

 var time = new Date();
   var nowDay = time.toLocaleDateString().replace(/\//g, '-');
   var createtime_Y = unix_to_datetime(1459407384, 1);
   function unix_to_datetime(unix, type) {
       var now = new Date(parseInt(unix) * 1000);
       var Y = now.getFullYear() + '-';
       //0-11,0代表1月
       var M = now.getMonth()+1 + '-';
       var D = now.getDate() + ' ';
       var h = (now.getHours() < 10 ? '0'+(now.getHours()) : now.getHours()) + ':';
       var m = (now.getMinutes() < 10 ? '0'+(now.getMinutes()) : now.getMinutes()) + ':';
       var s = (now.getMinutes() < 10 ? '0'+(now.getMinutes()) : now.getMinutes());
       switch(type) {
           case 1:
               return Y+M+D;
           case 2:
               return h+m+s;
           case 3:
               var M = (now.getMonth()+1 < 10 ? '0'+(now.getMonth()+1) : now.getMonth()+1) + '月';
               return M+D+h+m+s;
       }
   }
       console.log(nowDay);
       console.log(typeof(nowDay));
       console.log(createtime_Y);
       console.log(typeof(createtime_Y));
       if (nowDay == createtime_Y) {
           console.log(1);
       } else {
           console.log(2);
       }

如图？why?
为什么输出的是2？？？求解