These two new models are called C236A C236M Workstation and Workstation. As I imaginareis the last letter refers to the format form of each. The first is the second Micro ATX and ATX.
These plates offer modern storage technologies such as SATA Express or connectors socket3 M.2 (AHCI support for PCIe and NVMe). It also features USB 3.1 connectivity Gen2 controller with type C.
Also support multiple graphics configurations, both two specially designed for graphics chips AMD FirePro or NVIDIA Quadro. These new models will hit the market in coming weeks at prices yet to be confirmed