The standard version is used for R&D and project work while the academic version is used for lab experimentation and teaching.
The standard version is available as components that users can choose and assemble (https://tetcos.com/technology-libraries.html).
The academic version (http://tetcos.com/netsim-acad.html) is available as a single product and includes all the technologies given.
The main difference between the two versions is the availability of Protocol source C code, Event trace and External interfacing (MATLAB, LabVIEW, SUMO, Wireshark, etc) interfacing in the standard version.
Please see http://tetcos.com/version-comparison.html for a detailed comparison table.