>>> import arcpy
... import arcgisscripting
... import os
... import sys
... import types
... import locale
... #Input FC
... sourceFC = r"G:Backup.gdbmuni_provided_utilities_points_copy"
... rootdir = r"G:Orland ParkCH EAST ORLAND^WESTORLAND2"
... fieldsShp01 = arcpy.ListFields(sourceFC)
... newFields = []

... for file in os.listdir(rootdir):
... #Output shp
...     if file.endswith(".shp"):
...         print "The file does exist:", file
...         fieldsShp02 = arcpy.ListFields(file)
...         for field01 in fieldsShp01:
...             exists = False
...
...             for field02 in fieldsShp02:
...                 if (field01.name == field02.name and field01.type == field02.type and field01.length == field02.length):
...                     exists = True
...                 if (exists == False):
...                     if (field01.name != 'OBJECTID' and field01.name != 'SHAPE' and field01.name != 'CHECKED'):
...                         newFields.append([field01.name, field01.type, field01.length])
...             exists = True
... for field in newFields:
...     fieldnames = field[0]
...     trimmed_fnames = fieldnames[0:10]
...     arcpy.AddField_management(file, trimmed_fnames, field[1], "", "", field[2], "", "NON_NULLABLE","NON_REQUIRED","")