Knorr-Bremse or Haldex aftermarket replacement is better overall? Help!

In your opinion, if you have a fleet of commercial vehicles, and that 2 companies approaches you to sell you their aftermarket brake replacement packages, who would you choose - Knorr-Bremse or Haldex? Can someone share your experiences with me with regards to their service, part quality, ease of installation, etc. Furthermore, can someone highlight the pros and cons of these two companies aftermarket replacement brake products with respect to truck manufacturers such as Volvo, Dennis, Scania, MAN, Benz, etc. Any comments and experiences with be much appreciated. Thanks.

 

Seriously? No one has experience using either of these brands of replacement brake parts on their trucks?