There are updated (March 2025) Microsoft 365 plan comparison documents with lines added for Microsoft Defender Experts for Hunting and XDR.

These useful documents tell you which of the (many) different components are included in which Office 365/Microsoft 365 plan, and there’s a table for SMB customers (https://bit.ly/4kyNmWi), one for Enterprise customers (https://bit.ly/4hDoMRj), and still more for specialist US Government customers – one for GCC (https://bit.ly/4bYkXoy), one for GCC High (https://bit.ly/41ApWqX) and the final one for DoD (https://bit.ly/4hF1CKf).