I have personally never heard of Diamond Flight Academy from what I can recall from my memory, will take a look at it
Flyguppdraget is a very qualified and recognized school.
Flyguppdraget AB -
SPU, also very qualified but with dresscode and other small things..
http://www.svenskpilotutbildning.se/
Airways,
Välkommen till Airways Flygutbildning AB
Here is a full link of all the FTOs
Flygplan FTO - Transportstyrelsen
Let me know if you need some translation