Two days ago I installed a second copy of XP11 and then updated the 2nd copy to version 11.50Beta. Installed FT Las Vegas in XP11.50 and I have same scenery in XP11.41
Compared both versions I had basically almost the same FPS with just little differences. So, Las Vegas will run with XP11.41 with nice FPS over than 53 FPS. Today, I dropped the second copy and updated the first copy from v11.41 to v11.50 Now, happy VulKan features.