Is it recommended (or not), to run Cake/FQ_Codel in CPE routers, even if LibreQoS is running upstream?

If so, which are the advantages? Also, I'm assuming I will have to set up the router with a lower bandwidth than the assigned by LibreQoS?

For instance, if LibreQoS is assigning 13Mbit to the customer, the router (with Cake or FQ_Codel) enabled need to have a limit of ~11Mbit?