Is there any effective difference between although and while when meaning "despite the fact that", or are differences in usage only a matter of style rather than grammar? See the following sentences as an example.
- Although your work has improved greatly, there are still some skills that can be improved.
- While your work has improved greatly, there are still some skills that can be improved.
Are there instances where one is preferred over the other? Is although more precise, less ambiguous? I am aware that we cannot reverse the sentence with while as we can with although.