git-log --cherry-pick gives different results when using tag or tag^{}

Hello,

In mykernel repository, I'm having 2 different behaviours with git-log but I don't understand why:

Doing:

    $ git log --oneline --cherry-pick --left-right v3.4.71-1^{}...next

and

    $ git log --oneline --cherry-pick --left-right v3.4.71-1...next

give something different (where v3.4.71-1 is a tag).

The command using ^{} looks the one that gives correct result I think.

Could anybody enlight me ?

Thanks.