I have the KSO's and got my shipment of Bikilas. I use them for running and casual wear. I will not use these in court due to the lack of cushion at the heels. Like it of not, badminton is not good for your feet and unlike running, the human feet never evolved to play badminton any protection at the heels.
Ya that's the problem with these, no cushion. But for those who play bare footed badminton these may offer more grip.