CIMB rate is a bit slower, CIMBClicks rate is real time.

As pointed out, during CIMB office hours, the rate is much better than non office hours.

But one drawback / inconvenience is when you sell also need to remember this rule and do it during office hours for better rate. So there is risk that during night gold got good price, but when you want to sell at the morning, gold price is dropped.