iCloud Drive is automatically setup when a macOS or iOS user creates an iCloud account. macOS encourages users to store their Desktop and Documents folders in iCloud Drive, and their Photos library in iCloud Photos, and sync them to their computers. iMessage and FaceTime are enabled by default on those OSs as well. These iCloud features services have a free tier with adequate cloud storage for many very casual users; and they are deeply integrated into the OS.
How is iCloud Drive on macOS computers and iPads different from OneDrive on Windows PCs and tablets? OneDrive suggests users turn it on and store their Desktop, Documents, and Pictures folders in OneDrive? The only difference I see is that OneDrive is a bit less aggressiveâ"it uses notifications to recommend users enable it, rather than being presented as a default during the first run experience. (To be fair, both Windows and macOS make it difficult to setup a computer without using a Microsoft account or Apple ID, respectively, but macOS pushes users a bit harder to enable the cloud features.) iCloud Drive and Photos are accessible via a web client using most modern desktop browsers or the iCloud Control Panel for Windows, but full syncing of Documents and Desktop aren't as fully supported outside Apple systems with iCloud Drive as with OneDrive. There is no native Android or Linux client.
How is Teams different than iMessage and FaceTime? Like those, Teams allows chat/IM, video and audio calls, and screen sharing. For most non-enterprise users, the products would seem to have a substantially similar feature set. Like OneDrive, Teams is less aggressive than it's counterpart; not fully enabled as a default part of the setup experience. Teams doesn't bind to users' mobile numbers and intercept SMS and MMS from anyone who also uses it. Furthermore, Teams doesn't make itswef difficult to stop using by continuing to intercept those messages for weeks or months after the last time a user has been signed in. And it seems fair to mention that Teams is available on Windows, Linux, iOS, iPadOS, and Android. It also has a web client that works in any modern browser to support any other OS that doesn't have a native client, or for temporary or guest access on someone else's or a public device, and even on some devices with older operating systems which Teams native clients don't support. This provides access to one's instant messages even if they temporarily don't have access to their personal devices. iMessage and FaceTime are proprietary to macOS, iOS, and iPadOS, only run on Apple branded hardware, and only on newer models or OS versions. No other devices or systems are supported, and there is no web client.
So the differences I see are that Apple's similar services have been a built-in part of their OSs for longer, they are slightly more aggressive in prompting users to enable them, and they may be more difficult to stop using without short-term lingering consequences (unless a user follows specific steps they may be unaware of). Granted, Windows on phones isn't really a thing right now, but it's in use on a lot of desktops, notebooks, and tablets. macOS is in use on most of the remaining portion of desktops and notebooks. iPadOS is on more tablets than any other tablet OS. Despite the OS vendors deeply integrating these features for users who enable them, none of the OSs require their use. Windows and macOS can't prevent a user from installing clients for competing services, but Apple potentially could with iOS/iPadOS, since those systems only allow users to install apps from the App Store, which allows Apple to effectively block entire apps, or require features to be changed or removed before approving them.
Without arguing the merits of the complaint, I would argue that this action singles out Microsoft for doing essentially the same things Apple has been doing for much longer, and impacting a similar enough number of EU residents. Apple and Microsoft both enjoy privileged positions as OS vendors, which makes them experts on deep integration in their respective systems. Except with iOS, neither goes out of their way to prevent competing services from making similar apps. And unless either refuses to allow developers to sign their apps, none of their OSs go out of their way to make it difficult to install a third party app. Except for iOS and iPadOS, none of the systems have a mechanism for these vendors to prevent installation, and I haven't seen evidence that any such apps have been refused distribution through the respective app stores.
TL;DR: If anything, the allegations against Microsoft in this case cover behaviors similar to things Apple has been doing for many more years, in arguably more pervasive ways, and resulting in stronger lock-in to their ecosystem. For a case that centers around software and service vendors enjoying a fair environment in which to compete, singling out one vendor when another is using similar tactics, impacting a similar number of people in similar ways is the epitome of hypocrisy.