How to reintegrate with automatic merge (merge-tracking) in TortoiseSVN 1.8

I've read both these release notes for SVN 1.8 and this question concerning reintegration of a branch with SVN 1.8.

My questions, which I couldn't find an answer to, is the following:

Is there any difference between choosing

1. all revisions
2. specific range together with an empty box

in the Tortoise Merge-Dialogue when reintegrating a branch into the trunk?

Does Turtoise in either case use an automatic merge with merge-tracking? How can I verify that?

According to the documentation, checking "all revisions" is the same as checking "specific range" and leaving an empty box. In both cases, an automatic merge is used:

If you leave the range of revisions empty or have the radio button all revisions checked, then Subversion merges all not-yet merged revisions. This is known as a reintegrate or automatic merge.