The ArchiveDeploymentExporter should export both the archive and the testable archive (in the case they differ) for testable deployments. This enhancement simply makes it easier on the developer to

a) see the progression of the archive
b) see the contents of the original archive easier

Related source:
https://github.com/arquillian/arquillian-core/blob/master/container/impl-base/src/main/java/org/jboss/arquillian/container/impl/client/deployment/ArchiveDeploymentExporter.java