After buying it, I realized both cables are from different series although they look the same. I have no idea what are the differences. According to Benson Leung the USB3-CC5P support USB Power Delivery up to 100W (5A) while USB3-CCP supports USB Power Delivery of up to 60W (3A).
Elecom USB-C to USB-C Power Delivery Cable – Packaging Front
If you are looking to use a USB-C to USB-Cable to charge your USB-C MacBook Pro, your USB-C power adapter and USB-C cable need to support USB Power Delivery.
It is tough to find a USB-C to DisplayPort Cable or USB-C to DisplayPort Adapter. I have not found any physical stores in Singapore selling it yet. Instead, you have to get it from online stores like Lazada or Amazon.
For USB-C to DisplayPort cable, I bought mine from Amazon as there are more choices to choose from.