comparison with aws glacier CLI?

[aspiers]

#30 led me to boto/boto#1548 (comment) which in turn led me to the official aws glacier command. So now I'm a bit confused why glacier-cli exists at all, when there is an officially supported and apparently comprehensive upstream command which does the same thing. Is it simply that glacier-cli was created before aws glacier? Or does glacier-cli offer something which aws glacier doesn't? (besides git-annex support of course, which for me personally is the whole point of using glacier-cli)

I think this should be clarified in the README...