Package version differences between 14.04.4 iso and repo that apt-mirror downloaded

[Russell Jones]

Hi all, 

I am a bit new to Ubuntu administration (I'm a Redhat guy), and have
been working on a project for automated PXE installation of Ubuntu
nodes. 

I ran into a strange issue where the gcc-4.8 version that is included
with the latest 14.04.4 iso download differs from what apt-mirror gave
me when I told it to mirror the "trusty" repo. Example: 

>From the iso: 

[root at server main]# find . -name \*gcc-4.8\*
./g/gcc-4.8
./g/gcc-4.8/gcc-4.8_4.8.4-2ubuntu1~14.04.1_amd64.deb
./g/gcc-4.8/gcc-4.8-base_4.8.4-2ubuntu1~14.04.1_amd64.deb
./g/gcc-4.8/libgcc-4.8-dev_4.8.4-2ubuntu1~14.04.1_amd64.deb 

>From the mirrored repo (shortened with just the base package as there's
a lot of extras since it's the full repo): 

[root at repo pool]# find . -name \*gcc-4.8\* | grep base
./main/g/gcc-4.8/gcc-4.8-base_4.8.2-19ubuntu1_amd64.deb 

The iso was downloaded at the same time the repository was mirrored with
apt-mirror. 

So my question is 2 fold I guess, 

1) Why is the GCC version newer in the iso? 

2) Why did telling apt-mirror to mirror the "Trusty" repository not grab
the 4.8.4 version? 

Thanks! 

 
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