I want a tool that can do this.

gistfile1.sh

egj@alcibiades:~$ echo "PasteScript==1.7.5
> WebOb==1.0
> python-dateutil
> http://launchpad.net/bzr/2.3/2.3.4/+download/bzr-2.3.4.tar.gz
> -e svn+https://svn.socialplanning.org/svn/fassembler/tags/0.4#egg=fassembler-0.4
> -e [email protected]:deliverance/Deliverance#egg=Deliverance-dev" > /tmp/req1.txt

egj@alcibiades:~$ echo "WebOb==1.2
> python-dateutil==2.1
> Paste==1.7.5.1
> bzr==2.3.4
> [email protected]:socialplanning/fassembler.git@89e7b68a41be4c201e43b39e32e0571a5b6578ad#egg=fassembler-dev
> -e [email protected]:deliverance/Deliverance.git@24e83d419a4fa168ad49c4870e1f84971afee371#egg=Deliverance-dev" > /tmp/req2.txt

egj@alcibiades:~$ i-wish-i-could-pip-diff-reqs /tmp/req1.txt /tmp/req2.txt
{
  {'WebOb': {'version': {'old': '1.0', 'new': '1.2', 'conflict': true}},
  {'Paste': {'version': {'old': null, 'new': '1.7.5.1'}, 'exists': {'old': false, 'new': true}},
  {'python-dateutil': {'version': {'old': null, 'new': '2.1'}},
  {'Deliverance': {'revision': {'old': null, 'new': '24e83d419a4fa168ad49c4870e1f84971afee371'}},
  {'fassembler': {'version': {'old': '0.4', 'new': 'dev', 'conflict': true},
                  'revision': {'old': null, 'new': '89e7b68a41be4c201e43b39e32e0571a5b6578ad'},
                  'source': {'old': 'svn+https://svn.socialplanning.org/svn/fassembler/tags/0.4', 
                             'new': '[email protected]:socialplanning/fassembler.git'}, 
                  'editable': {'old': false, 'new': true}},
  {'bzr': {'source': {'old': 'http://launchpad.net/bzr/2.3/2.3.4/+download/bzr-2.3.4.tar.gz', 'new': null}}
}