Points that I noticed in comparison:
1. The Leifheit Twist System is located on the wiper attached to "activated" so that twisting his arms. When Viledawringsystem to use a pedal to the bucket in order to activate the rotation - it is operated with the foot. Operation with the foot like it better.
2. That is fixed at Leifheit on the wiper Twist system, I feel as a minus point (it stöhrt for example if you want to wipe under the bed / sofa, as it touches down on the ground). In Viledawringsystem the wringer is exclusively in the bucket, so that the wiper can be used as usual.
3. The 3-piece mop handle from Leifheit looks a bit wobbly compared to Viledawringsystem this is nice stable.
Conclusion: The Twist system / wringer itself convinced me - simple, good and playful handling. It makes cleaning easier! The system of Leifheit is good, the system of Vileda's better!