Short answer NO.
but, flow rates, brushes, fan or pencil jets are really a personal choice on your technique, type of work etc...
For me extreme brushes are too light and weak, I only use them for high commercial work.
Super light mixed medium is the best all round performer of everything I have tried.
Tecbuk are excellent brushes, however, you need excellent technique to use them, my one lasts well on everyday cleaning, but the staff just destroy them within a month, the bristles just curl so badly, Gardiners are tougher.
The stock is harder and less forgiving on trim and sills, so again a feather touch is req.
Lastly, the service is very, very poor!
HTH
Darren