No, "typically" it's a "know-it-when-you-see-it" kind of thing. Trying to delineate precise word count boundaries is a misrepresentation of how these words are used. The numbers you gave are reasonable guidelines but are certainly not determinative.
That chart implies it is possible for somebody to write a work that wins the Hugo awards for best novelette and best novella, which I’d really like to see happen!
For perspective closer to the topic here, these are the approximate word counts of the books currently listed at "George Orwell bibliography" under "Novels":
• Burmese Days (1934): 97000
• A Clergyman’s Daughter (1935): 94000
• Keep the Aspidistra Flying (1936): 87000
• Coming Up for Air (1939): 83000 (?)
• Animal Farm (1945): 30000 (just over 30k)
• Nineteen Eighty-Four (1949): 103000 (or 99000 without the “The Principles of Newspeak” appendix).