Webplayer compatibility with Editor

if I PUBLISH to WEB using 3.5.5 will the Plug-in 3.5.1f play it, and will I lose some functionality or all?

We run Unity in a closed Intranet system, where updates to Plug-in's are controled and take time to push out to over 700 machines. So I am trying to figure out how closely tied the editor and the webplayer are compatibilty wise. I expect the classes to be pretty close since the family is 3.5 , but not sure how big a deal is the .5f from .1f ?

I am going to test this, but thought I would see if a true expert could help me.

One of my issues is that I need to get some work completed and put into production, but don't want to waste time if the webplayer will give me grief (getting the push update for the webplayer can take weeks in our control system)