I see no difference in changing these settings.

Swimlane Allocation Definition vs Usage

https://docs.nomagic.com/plugins/servlet/mobile?contentId=64959125#content/view/64959125

Information flows Direct vs Between Part Types

https://docs.nomagic.com/pages/viewpage.action?mobileBypass=true&spaceKey=SYSMLP2021x&title=Creating+Item+Flow