If you are debating between the standard installer and the portable version, here are three reasons why the portable route wins every time:
Many corporate environments restrict the ability to install new software (the dreaded "Do you want to allow this app to make changes to your device?" prompt). With a portable install, you simply unzip the folder and run the executable. You bypass the installer entirely, meaning you can use the tool on locked-down workstations. xlcompare portable install