Bitwig Studio and FL Studio are both full DAWs, but they answer different questions. Bitwig, built by ex-Ableton engineers, is a modular, cross-platform environment organized around modulation and sound design. FL Studio is Image-Line's pattern-first workstation, the reference workflow for beat-driven electronic and hip-hop production.
Decisive signal
The deciding split is how each one thinks about a song. FL Studio starts from patterns and the Step Sequencer: you build short loops, then stack them as blocks in the Playlist, which makes it the fastest tool for turning a groove into a sketch. Bitwig starts from signal flow, where almost any parameter can be modulated by almost any source and The Grid lets you patch synths and effects from scratch, so it rewards producers who think in modulation rather than presets. One optimizes for speed getting a beat down; the other optimizes for depth designing the sound itself. That, more than any feature checklist, is what actually decides it.