Stockfish 15 vs Stockfish 14. Live

Hardware Threadripper 2950x, RTX 2080TI  64 GBs Ram, SSD 2 TB Evo 970 Plus

Tablebases = 7 man top 10.
Book Perfect Book 2021
GUI = CuteChess
Hash = 1 GB.
1 Threads.
TC =1m + 1s

Results.

Score of Stockfish 15 vs Stockfish 14: 328 - 44 - 3628 [0.535]
...      Stockfish 15 playing White: 273 - 9 - 1718  [0.566] 2000
...      Stockfish 15 playing Black: 55 - 35 - 1910  [0.505] 2000
...      White vs Black: 308 - 64 - 3628  [0.530] 4000
Elo difference: 24.7 +/- 3.2, LOS: 100.0 %, DrawRatio: 90.7 %
4000 of 4000 games finished.

mwyoung wrote:

Results.

Score of Stockfish 15 vs Stockfish 14: 328 - 44 - 3628 [0.535]
...      Stockfish 15 playing White: 273 - 9 - 1718  [0.566] 2000
...      Stockfish 15 playing Black: 55 - 35 - 1910  [0.505] 2000
...      White vs Black: 308 - 64 - 3628  [0.530] 4000
Elo difference: 24.7 +/- 3.2, LOS: 100.0 %, DrawRatio: 90.7 %
4000 of 4000 games finished.

I am afraid it is only at fast time control.

I see no improvement in stockfish based on the ccrl rating list

https://ccrl.chessdom.com/ccrl/4040/rating_list_all.html