Question about the result on "MSMARCO Passage Leadboard".

[hangzhang-nlp]

I notice that C-Coil is at the top of the "MS MARCO Passage Ranking Leaderboard", the results are "0.427 on eval" and "0.443 on dev". But the result in https://github.com/luyug/COIL/tree/main/examples/c-coil is "0.3734 on MARCO DEV".

I wonder why the gap is so big? Is it because of ensemble? I didn't find any relevant explanation in the Coil paper.