The real kicker is that the P51 with a Xeon E3-1535M v6, 64GB ECC RAM, Quadro M2200, 1TB SSD, and 4K screen costs about $500 less than the 15" MBP with 1TB storage. The weight difference compared to "thin and light" 15 inch models isn't even that dramatic, it's all of one and a half pounds heavier than the MBP or one pound heavier than the XPS 15.
Not in Aus, where most tech is price-gouged, but the Lenovo workstation-grade stuff seems particularly egregiously so. Your spec p51 for example is $7200 vs $5000 for the MB Pro 15" 1TB. A better machine, certainly, but much more expensive.
