[Samba] inetOrgPerson vs. sambaSidEntry for Computer accounts in LDAP

[Spencer]

I am looking at my computer accounts that were created using 
smbldap-useradd.pl -w workstationname. And I see the following 
objectClasses: 

top
inetOrgPerson
posixAccount
sambaSamAccount

I understand I need one structural objectClass, but don't understand why 
inetOrgPerson is being used.  Couldn't I use sambaSidEntry instead?  
sambaSidEntry is structural, and only requires sambaSID.

Any insight is welcome.

Spencer