What is the difference between Get-InstalledModule and Get-Module -ListAvailable?

Question

As far as I can tell they do the same, so what is the reason to use one over the other?

(Sorry, SO question rule engine - have no idea what else to say)

Answer 1

Get-InstalledModule is part of PowerShellGet and will list installed modules using Install-Module cmdlet, But Get-Module -ListAvailable shows modules from all locations mentioned in $env:PsModulePath location.