According to the minecraft wiki, this article specifically: https://minecraft.fandom.com/wiki/Armor/Old
and this one, where the one above is linked and referred to:
https://minecraft.fandom.com/wiki/Armor#Damage_protection

Bedrock edition uses a different system from java edition, unlike what has been said by a mod in this report:
MCPE-174871
And while for the zombie the damage values more or less align with what should be correct according to that "old"/bedrock system (where iron swords deal 2.8 damage, so 1.5 hearts, on iron armor), they are incorrect on the player, regardless which system is applied (on the "old" one it should be 1.5 hearts on nearly all hits, on the "newer" one the THIRD hit should be dealing 1.5 hearts of damge, not the first one, and by hit 5 the player should be on 0.5 hearts of health, but he isn't)

I am also fully aware that I reported this bug before (I literally linked the old report here), but since its incorrectly marked as "resolved" with the mod claiming no bug is in place, I decided to make a new report, as there is a bug in place and the only reason the mod is claiming otherwise is seemingly due to an inability to differentiate between bedrock and java edition.

Additionally, even IF the "old" system isn't the one bedrock uses (even though it has to be due to the lack of armor toughness as a ingame value on bedrock and the fact that the MOD is the one who provided the wiki link as a source in the old report), damage values dealt to mobs and player should not be different unless regeneration is involved with the player (it is not in this case, as it has been turned off for test purposes when I made the player clip).

In other words: regardless which damage values are wrong, either the players or the zombies ones are working incorrectly, and in the worst case scenario both are incorrect.

This also makes it take more hits to kill a zombie than it takes to kill a player, despite the weapons and armor used being literally the same.

Steps to reproduce:

1. get an iron sword
2. hit a player, who is wearing full iron armor, with said sword
3. repeat this with a zombie who is wearing full iron armor, with the same sword

Observed results:
On the player, most hits deal 2 full hearts of damage, and the zombie receives less damage per hit than the player.

Expected results:
Each hit deals approximately 1.5 hearts of damage, and the damage the player and the zombie receive is the same.