What's the difference between these two

I want to make a purchase of one of these two battery cases and I'm stuck. From what I can tell is that the MJP Outdoors Edition has 150% more battery life than something, if it's the Pro then I'll buy this one but if it's the plus I couldn't care less because I need my 4s to be protected. I'm willing to shell out an extra $20 if it means I'll get more battery life outa my phone. Thanks to all that answer this problem, preferablly I'd like the answer to come sooner rather than later due to me needing it as soon as possible! Again, thanks to all! Here's the links to the two I'm considering, but, if anyone thinks that there's a better alternativem then by all means chime in!

Mophie juice pack "Outdoors Edition":
http://www.mophie.com/ProductDetails.asp?ProductCode=2175_JPPRO-IP4-ORG&CartID=3

Mophie juice pack Pro:
http://www.mophie.com/juice-pack-PRO-Rugged-case-for-iPhone-4-4S-p/2120_jppr-ip4-blk.htm

One is for outdoors.

Both have the same battery and specs, only difference is in the outdoor version is orange and comes with their own special app.

APP
https://itunes.apple.com/...mpt=uo%3D4

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