If it was "game crashed, here's the stacktrace" before and now (or later) it's "player put 20 blocks of gold on server IP 127.0.0.1 with players foo, bar, baz present", it's a difference.
launcher identifier user identitifer (XUID) client session id (changes on restart) world session id (changes per world load, to be reused for later events) game version operating system name and version Java runtime version if client or server is modded (same information as on crash logs) server type (single player, Realms or other) game mode
Are you certain about your assertion? Can you link to the document where you found it?
https://www.minecraft.net/en-us/article/minecraft-snapshot-2...