-TC=4'+2"
-Hash=256 MB
-GUI: Arena 3.5.1
-Book: IM_4mvs.abk (8 plies book) - for both engines
-default settings for both engines
-Fire_8.N_x64_bmi2 uses a net created by Sergio Vieri
-1 thread-CPU=Intel i5-7400-3GHz (Kaby Lake)
-TBS: 6-men Syzygy bases for both engines
-OS: Windows 10 Home.
Stockfish 11 x64 has 3533 Elo points (CCRL Blitz).
Expected rating for Fire_8.N_x64_bmi2 is around 3519 Elo points. +78 Elo points face to Fire 8.1 x64 (in my single match test).
Fire 8.1 x64 has 3441 Elo points (CCRL Blitz).