State difference between stats vs eventstats command.
Answer»
STATS: The Stats COMMAND in Splunk calculates statistics for EVERY field present in your events (search results) and STORES these values in newly created fields.
Eventstats: Similar to the stats command, this calculates a statistical RESULT. While the Eventstats command is similar to the Stats command, it adds the aggregate results inline to each event (if only the aggregate is relevant to that event).