In all fairness, I feel the need to speak about a native GIMP tool even if it's an useless tool, the Cage transform 
Now about the two scripts, both do a great job, and you certainly want to use them, for multiple reasons (I prefer by far to use them)
With scm you have time to get a coffee and maybe take your dog out for a ride, but it's dead simple to use.
With the python (there is a manual with it) it's very simple to use but there is a caveat ➤ you will not have time for a coffee because it's super fast like instantaneous.
Now about the two scripts, both do a great job, and you certainly want to use them, for multiple reasons (I prefer by far to use them)
With scm you have time to get a coffee and maybe take your dog out for a ride, but it's dead simple to use.
With the python (there is a manual with it) it's very simple to use but there is a caveat ➤ you will not have time for a coffee because it's super fast like instantaneous.