FL Studio and Live support drag and drop option which eases up the work when adding samples, instruments, and effects.
Both have automation curve options so that you don’t have to do all the programming by hand.
Both can be used as a live performance tool with FL Studio’s Performance mode and Live’s Session view.
Both can function as an extension of other DAWs via rewiring so you can incorporate the strength of both platforms in producing your track.
Both can let you place time markers and both have their tiny playlist view in the scroll bar so that you can easily navigate through your project.
Both can let you make variations in tempo and time signature.
Both can let you import videos for music scoring and overdubbing.
Both can let you edit multiple midi clips all at the same time which is very useful for layering or stacking instruments.
Both can let you take the melodic and rhythmic content of a sample and convert it to midi.
Both platforms can render the same quality of audio since both have a reliable and high-quality audio engine.
Both can let you use the computer keyboard as a midi controller which is very convenient when you’re working on a project on the go. However, FL is slightly more advantageous in this feature since it has a few keyboard layouts that you can pick from.
Both platforms can let you create your own complex effects chain through FL studio’s patcher & Ableton live’s Max4Live.
Both DAWs allow you to save their respective mixer and instrument presets and project templates for the future.
Both can let you export stems and project data for mixing, mastering or collaboration work.
Both platforms can let you warp audio and stretch midi clips. They have their unique warping algorithms that you can use alternately depending on the type of sample that you are working on.
Both can let you map important effects or instrument parameters to the controller easily.
Both DAWs have a real-time audio view when recording audio so you can monitor the amplitude of the sound source.
Both DAWs have a tap to tempo function where you can simultaneously hum and click so the software can accurately detect the tempo of the melody or beat that you have in mind.
Both have a feature that allows the cursor to scroll through the project horizontally while it's playing. What it does is it positions the cursor in the middle while the arrangement window smoothly moves forward. The way these 2 DAWs do it is different - In FL Studio you need to hold Alt + 0, in Ableton you just need to click the follow button or execute the shortcut ctrl + shift + F.
Both can conveniently consolidate both midi and audio in their respective arrangement windows.