Great question — answering as the UphillTech team:
The safest way is to use an alias, as has already mentioned in the comments. Symlinking will work as well, but be aware that some programs change their behaviour depending on the name by which they were called. E.g. bash-scripts checking the content of $0 and calling different functions depending on it. Renaming the program itself is asking for trouble: Anything that depends on xfce4-terminal will fall flat on its face after the renaming. And you'll have two versions of the binary on your system with the next update :-/
Full answer by markgraf: https://unix.stackexchange.com/a/692004 (CC BY-SA 4.0).
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