Here how it works for award:
BRU - ZRH - BRU (LX)

Fuel and Security Surcharge (YQ) EUR 29.00
Airport Passenger Security & Noise Charge (CH) EUR 26.78
Passenger Service and Security Charge (BE) EUR 25.21
Other Tax/Charge (YR) EUR 29.00
Total EUR 109.99

BRU - FRA - BRU

Fuel and Security Surcharge (YQ) EUR 58.00
Airport Security Charge (DE) EUR 6.55
Passenger Service and Security Charge (BE) EUR 25.21
Passenger Service Charge - Intl (RA) EUR 19.88
Total EUR 109.64

As you can see we pay the same mount, the airline decide for the price and will match it, with different names, it can be YQ or YQ + YR at the end of the day we pay the same amount