What type of group to choose in OpenLDAP for user grouping

I need to know which group I should use to group users in LDAP.

I basically need the MemberOf function to get some group membership permissions.

Example:

Users - User 1 - User 2 - User 3 groups - Group 1 - Group 2

User 1 is a member of Groups 1 and 2.

Groups must be dynamic, such as Active Directory.

Questions arise because I have them to choose from:

Samba: Group Mapping

User Group

Generic: Posix Group

The same applies to users, which one to choose?

Generic: User Account

Samba: Account

I can not find a good site that shows the differences, any link will be very appreciated.