DC Studios is the overarching brand that encompasses all creative aspects of the DC Universe, including film, television, animation, and digital content. It was established to unify the various projects under a single vision and leadership.
DC Films, on the other hand, specifically refers to the film division within DC Studios that focuses solely on producing movies based on DC Comics characters. This includes theatrical releases and direct-to-video animated films.
In summary, while DC Films is a part of DC Studios, the latter has a broader scope that includes all forms of media related to the DC Universe.
Pro tip: Keep an eye on announcements from DC Studios for upcoming projects that may span multiple platforms, as they are likely to have a cohesive narrative across films, series, and animations.