Why do I see two Primary Product options for Advanced Search on Leads?

Two Primary Product search options are available in the Lead Advanced Search dialog. Both options point to the same Primary Product field, but when selected, one option performs a List of Values search and the other option performs a Text search.

The first option is the default List of Values search (as Primary Product is a Dynamic Choice List (DCL) field) and the second Primary Product search option lets you use a text search with improved search results performance.