Apple Notes disappear if they get corrupted
I have noticed a behaviour where editing an Apple Note, which is opened on your Mac and iPhone at the same time, results in the note getting corrupted and simply vanishing. The note is not in the Recently Deleted bin, it just disappears. Too bad if you had important information stored in that note!
I've been using Google Keep everyday for years and have never seen this happen. Google Keep seems to handle multi-device editing seamlessly and offers superior sync integrity and stability.
I've been parallel running Google Keep with Apple Notes for over a month now and keep finding examples that suggest Notes is not reliable. So for anything important I continue to use Keep.