LC0 vs Sting SF 9 x64 (3000 elo) special

[Hai]

LC0 ID 271 vs Sting SF 9 x64 (3000 elo)
AMD R9 390 (t2) vs i7 3930k (1 core @ 4GHz)
3000 mb vs 3000 mb
TC: 1 minute game + 15 seconds per move
Aquarium 2018 gui
Ponder on selected for both
No book
The 20 possible opening moves were played = 40 games

Result:
+7 =3 -30
8.5 vs 31.5
228 elo difference
21.25% winning percentage

All games: http://www.mediafire.com/?el8v9pzlxkfrq

ID 271 is 228 elo weaker than Sting SF 9 x64.
~2772 elo.

[JJJ]

ID 271 is a clear regression.
So why not try the ID253 instead ?