What is the primary difference between open cluster formation and the creation of isolated stars or binary pairs?

Answer

Many stars are born within the same localized cloud structure

The formation of an open cluster is distinguished by the simultaneous birth of many stars, concentrating hundreds to a few thousand members within the same localized cloud structure.

What is the primary difference between open cluster formation and the creation of isolated stars or binary pairs?
galaxiesastronomystar formationopen clusters