I tested al tree variants on my rig.
Win 10 x64, i7 4970, 16 Gb ram, R9 380 4gb
All variants give me various graphical glitches, from minor to really bad ones.
Worst in this regard was Vulkan variant. It has various stutters, occasional screen tearing and strange glitches in almost every visible scene element.
Should I provide my dxdiag?
Regards