Windows 11 Pro.
Ultracompact mini PC with 10th Gen Intel® Core processors, up to 64GB DDR4 RAM, M.2 SSD, Thunderbolt 3, Wi-Fi 6 and USB 3.1 Gen 2 Type-C

Windows 10 Pro.
The versatile, high-performance mini PC with Intel® 10th Gen processors, DDR4 RAM, 4K UHD video output, triple storage with one M.2 SSD and two SSDs/HDDs, and WiFi 6

Windows 10 Home, Free Upgrade to Windows 11¹ (when available, see below); Barebone and Non-OS SKUs are excluded,
Workstation mini PC with Intel® Core™ processors, NVIDIA® Quadro® graphics, Intel® Optane™ memory, dual storage, ISV certification and support for up to seven displays

Windows 10 Pro, Free Upgrade to Windows 11¹ (when available, see below); Barebone and Non-OS SKUs are excluded,
Ultracompact mini PC with Intel® Celeron® and Pentium® Sliver processors, DDR4 RAM, dual storage, 4K UHD support, Wi-Fi and USB 3.1 Gen 1 Type-C