I suspect both spellings are attempts by English speakers to render the same Ute word in the Roman alphabet.
The United States is full of place names that require quite a bit of study to determine what Indian word was the actual origin of the name.
Few American Indian languages had a fixed system of writing them in Roman letters at the time the place names were recorded.
Some still do not. For example there are two commonly used ways to spell Chickasaw words; but many of the places that names that have Chickasaw origins
bear little resemblance to words spelled either way, as these spellings are a more recent development.