Difference between Optimized and Static Javascripts

I'm trying to optimize my site and needed some info.

In the media folder for easysocial there are 4 scripts
easysocial-1.3.25.static.min.js
easysocial-1.3.25.static.js

easysocial-1.3.25.optimized.js
easysocial-1.3.25.optimized.min.js

What is the difference between the above two scripts, can the site work if only optimized.min.js is loaded? or both static and optimized is needed?

I ask this because my sites home page is loading media/com_easysocial/scripts/easysocial-1.3.25.static.min.js which is more than 1mb and i only have a streams module & login module published. Is this even needed on home page as easysocial is loading other javascripts as well on home page, namely:
com_easysocial/resources/f032ce2a9c95c133406b5421f2dd74a5.js
/media/foundry/3.1/config/c6e6df0c4f3f05c5458b6890d789478d.js
/media/foundry/4.0/config/81aac46b27fc08faec7c39b93c279eb6.js
media/foundry/3.1/scripts/foundry.min.js
/media/com_easysocial/config/5f405e0daaca52b1aec1a2a5f9fba820.js


If you notice above there are two versions of foundry config being loaded?, i believe that easyblog uses foundry 3.1 & ES uses 4.0?? cant we get away with using only one?

regards.