As we can see in this fragment of an X-Wing during the trench run:
An X-Wing with shields set to "all power to rear" is able to block a few shots. After this, it must be evacuated or will be destroyed.
However, in Star Wars Rebels we can see that TIE Defender gets 2 direct hits and is still in action.
Similarly, in Star Wars: Resistance an X-Wing gets one hit and has a disabled engine, while Red TIE also gets hit and is still in action. It looks like the Empire/First Order put no shield or very strong shield, while Rebels have always shields, but very weak.
Is a TIE Defender's shield stronger than X-Wings, or is this difference because of other reasons? I'm looking especially for canon answers, but non-cannon also are welcome as additional info.
BTW. In Battlefront II we can get few hits in normal TIE and it's still working, but I assume it's because it would be too hard to win if we have no margin at all.