Difference Between IP Throughput in DL and DRB.PdcpSduBitrateDlMax (or Average)

Hello, dear experts!

Do you know the difference between these KPIs?

  • IP Throughput in DL = ThpVolDl / ThpTimeDl (kbit/s)
  • DRB.PdcpSduBitrateDlMax (or Average)

What distinguishes them, and how should they be interpreted in network performance analysis?