You probably have questions about whether you should upgrade, and we have you covered with this look at all the differences between the two. But there are also key under-the-hood changes that set the next generation of Windows apart from the current generation. With the new OS now available on select devices - and through upgrades rolling out from Microsoft - comparing Windows 11 versus Windows 10 has never been more important. Windows 11 marks a big departure from Windows 10 in terms of design, but the two operating systems are very similar under the hood.