First, there is no major difference in this field.
There is only a small difference between experiencing Auto Mail Sender Standard Edition (AMSSE) on WinXP- and Vista/Win7+ as below:
It does not support selecting recipients from the Windows Contacts for Windows Vista/7+ currently.
Usually, AMSSE users select recipients from the csv/txt/xls/xlsx files, so you can export your recipients from Windows Contacts to the csv file and select recipients from the exported file.