The updated Zbook 14u and 15u are thinner and lighter than previous models, but also pack more powerful specs like quad-core gen 8 Intel CPUs up to i7-8650U, AMD Radeon Pro WX3100 GPUs, up to 32 GB of DDR4-2400 RAM and up to 2 TB of NVMe SSD storage.
https://www.notebookcheck.net/HP-refreshes-ZBook-series-with-14u-and-15u-models.281826.0.html