Hi stevesteve,
1). LabVIEW MathScript Node is used to create scripts using the LabVIEW MathScript syntax, load scripts you wrote in the LabVIEW MathScript syntax or other text-based syntaxes, edit your scripts that you create or load, and process your MathScripts and other text-based scripts by invoking the MathScript RT Module engine. MathScript Nodes can process many of your text-based scripts created in a MATLAB or compatible environment. However, because the MathScript RT Module engine does not support all functions supported by the MATLAB software, some functions in your existing scripts might not be supported.
2). MATLAB® script node calls the MATLAB® software to execute scripts. You must have a licensed copy of the MATLAB software version 6.5 or later installed on your computer to use MATLAB script nodes because the script nodes invoke the MATLAB software script server to execute scripts written in the MATLAB language syntax. Because LabVIEW uses ActiveX technology to implement MATLAB script nodes, they are available only on Windows.
3). Math Script RT Module adds LabVIEW MathScript Node into LabVIEW.
I hope that you will find this information useful!
Kind Regards,