Maya PLE is currently based off of Maya 8.5, the restrictions in place in the PLE are as follows:

Watermarked Renders
No PlugIn support (mll files)
Uses its own file extension
No Import or Export of Data to and from Full Versions
Runs for ever

The rest of the application runs the same as Maya 8.5 does.

The education version has the same as the same Version of Maya Complete, not Unlimited. As stated above Maya Education version is for personal use only and you break the EULA if any data created in Maya Education Version is found to be used in Commercial Presentions. This is due to the cost difference of the licence and the licence agreement (EULA) between it and the full versions. Also be aware you will need to be in full time education with a Valid Student ID to qualify for the Education version.

Good Luck.