+ Stable
+ Much more hardware (screws (depending on the thread in the TV), spacers (for possibly rounded devices) etc.)
Relatively easy to mount + TV
+ Can be done easily with theft Vorhängechloss
Bad points:
- Enclosed washers fit only for the small screws' presumably with larger heads are no longer needed
- The installation manual is a joke (they have set in "customer images")
- Built-in level unusable 'seems to be filled with honey ...
- Exactly horizontal installation very difficult because screws are not connected by round, but wide, oval holes -> marking bit complicated
At the end but still counts the result, and that looks to me well! :)