I hundred percent with olx as far as my experience concern. The reasons are
Reliability
Olx is very much reliable compare to quikr as one will get genuine responses on olx and it’s more famous. I have sold many products on olx and recently tried with quikr so I realised that I was getting mostly fake responses.
User Interface
Olx user interface is more flexible and easy to use compare to quikr as olx do not ask much details of what to sell whereas quikr asks for dozens of details and some of which are difficult to explain.
Customers
In case of customers we get 100s of responses on quikr bit almost all of them are like for time pass whereas in olx we get few response but they are genuine.
Charges
Charges are higher in olx but that obvious as it gives service too and in case of quikr I experience that they take money but do not even give services so I lost my 50? at quikr.
So all were above points are enough to explain that Olx is far more Bette than Quikr.