Refl is designed for practising while watching yourself, not mainly for meetings or slide sharing.
Answer
Refl is built for a different purpose than standard meeting-style screen sharing. It is designed to let you watch your own camera video on a large screen while practising, rather than primarily sharing slides or a desktop.
Main differences
Item Refl Typical screen sharing --- --- --- Main purpose Check your own movement Meetings and presentation sharing Camera device Usually a smartphone Often a PC Compare with reference video Built for it Not the main focus Low-latency priority High Depends on the product
Notes
Refl is usually a better fit for practice
Standard screen sharing may fit better for meetings or presentation workflows