Oxford English Dictionary V3

OED v3 from the following link has two mdx files

OED(20200828).mdx → 710M
OED(20200828)1121284 深度提取 可能卡卡卡.mdx. 716M

what is the difference between these files?
which one is preferable?

Thanks for the wonderful site and resources you are sharing.

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Based on the literal meaning, I guess that the second file may have extracted more phrases, so there are more index entries, which will slow down the search speed.