Both applications are very similar. Each person has their own preference.
I have heard former shake artists say that there are features in DF that make things easier, like it’s timeline and spline editors.
I think performance wise, shake on windows (which has now been discontinued) and Df were similar, but have heard that shake on linux is faster.
Both apps have been used in feature films, I most recently worked on one called Goodboy with DF. There are also more and more studios buying into DF as shake is migrating out of the windows world.