I haven’t used Android for a few years so things may have changed, but using your WhatsApp message example:

• On Android, you don’t need banner notifications (not always desirable) to know you have a WhatsApp notification while in another app, there will be an icon or dot in the notification bar.

• You can reply right from that notification, no need to go into WhatsApp.

• Notifications on the Lock Screen and the Notification Center are the same, you can reply (or mark it as read or dismiss it) in one place and it carries over, which can help with clutter or confusion.

• No difference between swiping down from the top-right and the top-center, since Android’s version of Control Center sits right above your notifications.

• Notifications are consistently grouped by app with a drop-down arrow to split out or collapse each group.

• Notification badges on apps use a similar color to the app and no number, that one’s more of an aesthetic thing but some prefer that subtlety to the bright red badge with a specific number.

In some ways, Android’s approach is more streamlined. Swipe down from any part of the top of the screen, see all your notifications (and toggles), act on anything you wanted to, then swipe back up to put away the shade & get right back to what you were doing.