I came across the words anthropometric and anthropometrical in the context of clinical studies. According to en.wiktionary.org, both are adjectives and they are explained as follows:
anthropometric = "of, or relating to anthropometry"
anthropometrical = "Pertaining to anthropometry"
To me this sounds pretty similar.
What exactly is the difference between them? Could I replace one by the other in all cases? Is there a subtle difference in their meaning that I did not get? Or is there maybe a difference in usage (e.g. one is more colloquial; one is more frequent in the UK; one is only used in certain context, etc.)?