Difference betwen groups in the Builtin container and Domain Local groups

Group sAMAccountType groupType systemFlags isCriticalSystemObject
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Built-in 536870912 -2147483643 -1946157056 Yes
DL       536870912 -2147483644 <Not Set> <Not Set>The groups in the Builtin container may look like ordinary Domain Local groups, but they are not. In Windows Server 2003 Active Directory they are listed as Builtin Local.
These groups cannot be used on other machines in a domain when the domain is in native mode (as can other Domain Local groups in native mode).
The builtin groups are only valid on Domain Controllers.

<— From ADSI SDK : Start ————————————————————————>
The groupType attribute in Active Directory contains the group type definition:
ADS_GROUP_TYPE_GLOBAL_GROUP
ADS_GROUP_TYPE_DOMAIN_LOCAL_GROUP
ADS_GROUP_TYPE_UNIVERSAL_GROUP
ADS_GROUP_TYPE_SECURITY_ENABLED

The first three flags specify the group scope.
The ADS_GROUP_TYPE_SECURITY_ENABLED flag indicates the type of the group. If this flag is set, the group is a security group. If this flag is not set, the group is a distribution group.ADS_GROUP_TYPE_GLOBAL_GROUP        = 0x00000002
ADS_GROUP_TYPE_DOMAIN_LOCAL_GROUP  = 0x00000004
ADS_GROUP_TYPE_LOCAL_GROUP         = 0x00000004
ADS_GROUP_TYPE_UNIVERSAL_GROUP     = 0x00000008
ADS_GROUP_TYPE_SECURITY_ENABLED    = 0x80000000

ADS_GROUP_TYPE_GLOBAL_GROUP
Group that contains only accounts and other account groups from its own domain.
This group may be exported to a different domain.

ADS_GROUP_TYPE_DOMAIN_LOCAL_GROUP
Group that can contain accounts and universal groups from any domains. It may not be included in either access-control lists of resources in other domains or groups other than global groups in the same domain.

ADS_GROUP_TYPE_LOCAL_GROUP
This flag is for the WinNT provider as the
ADS_GROUP_TYPE_DOMAIN_LOCAL_GROUP flag is for the LDAP provider.

ADS_GROUP_TYPE_UNIVERSAL_GROUP
Group that can contain accounts and account groups from any domains, but not domain local groups.

ADS_GROUP_TYPE_SECURITY_ENABLED
Group that is security enabled. This group can be used to apply an access-control list on an ADSI object or a file system.
<— From ADSI SDK : End ————————————————————————–>

In reality there exists a fifth group type:
ADS_GROUP_TYPE_BUILTIN_LOCAL_GROUP = 0x00000001

These groups can only be security enabled, and when they do, they have a groupType attribute with the value -2147483643.