The biggest difference between a 4-wheeled rollator walker and a traditional walking frame is that it is equipped with wheels, a braking system, and a built-in seat. This design is to meet the user's need to "rest at any time" while walking.

If you can still walk, but have difficulty walking for extended periods, then a 4-wheel rollator walker is a better choice. If you cannot walk safely or have very limited mobility, then an electric wheelchair is a better choice.