OpenGL better than Vulkan

Problem

• Vulkan works on 60-80fps, but gameplay is in slowmotion. This is no playable. CPU usage is about 60-70%, GPU 100%. 
  
• OpenGL works on 30 fps, but gameplay works better, than Vulkan and it's playable. But this have a sound scratching. CPU and GPU have same usage - about 60-70%
  

Specs:
RPCS3 version: 0.0.14-11513-18721609 Alpha
Game: NHL Legacy 

CPU: AMD Ryzen 7 2700X on 4,3 GHz (8 cores, 16 threads)
GPU: AMD Radeon RX550 on 4 GB
MEM: 16GB DDR4

Settings screens in attachment.

Can you help me, why is Vulkan have 60-80 fps but in slowmotion? And can you recommend a better settings? 

Thank you so much. 
Regards