Is there a way or method to do an export of between two revisions to a physical directory?
In this way, the result expected is to have only files, changed between the specified revisions.
You can only check out individual revisions. What you are probably looking to do is export only the files changed between 2 revisions. Pseudocode:
svn diff --summarize -rSTART:END
for each item
svn export URL_TO_ITEM LOCAL_PATH