Apple

The thing is, when you say "longer support" and "apple ecosystem" you are already talking about a ton of features equivalent to the amount Android provides. Except the ones on iOS are all built-in.

The coherency of software and hardware is a world of it's own. There are specific features of every device and every new release which blow people's minds (Vision Pro reference). Some say Apple didn't invent these "features", and some of these claims are correct. But innovation is not the thing special about Apple products, it's consistency. Shit works beyond expectations, and Apple designs them in a way far better than any competitor. For example, Face-ID as one of the replies said.

The simple and minimalist design of the OS, which is worth opening a paragraph for. Honestly, compared to Apple OSes, the design mentality of Windows and Android feels like they were quickly glued with things during a rainy night of 1980 and left like that. Sure you can change those on Windows and Android, but then it's bloat, which is an unacceptable term for Apple devices.

Also system specific things such as absence of garbage collection and using ARC instead (which is one of the reasons why iPhones come with half the ram compared to Android devices yet provide the same performance), the power management and processor efficiency, the unmatched security for both the device and ecosystem. Also neither iOS nor MacOS come with built-in adware compared to Windows and some versions of Android. Nor nothing on Apple OSes can use trackers without your consent.

As for the ecosystem itself, for me, Airdrop and Handoff are one of the best things. If you own a Windows pc and Android device, you'd normally need to setup a bluetooth file sharing server to send a jpeg from one device to another and god knows if it'd work. But if you own a Mac bundled with an iPhone, forget sharing whatever file type you want to whatever application; you can just "copy" anything on one device and instantly "paste" it to the other device, at crazy speeds independent of your bluetooth or wifi tx rate thanks to the built-in Airdrop Receiver which uses P2P tech. (Unlike a FTP server, you don't even need a router as a middleman to use Airdrop).

Oh also, there's this another topic about what can you accomplish with a jailbroken iPhone, but I won't write it here.

TL;DR: iOS be screaming "QUALITYYYY" all over.