What is difference between 5G Slicing and Qos ?

• QoS differentiation can discriminate between different  types of traffic but cannot discriminate and differentially  treat the same type of traffic coming from different  sources.
• QoS differentiation does not have the ability to perform E2E traffic isolation

On the other hand:

• 5G slicing along with Qos is able to discriminate between the same  types of traffic coming from different tenants/slices.
• Network slicing allows multiple logical networks to run  on top of a shared physical network infrastructure,  providing isolation between them

So we have a deeper granularity: The same traffic flow withQoS Flow ID= 6 is treated in a different way according to the slice to which it belongs as show in figure above