My working theory is that people who prefer more wear resistance in their steels don't mind sharpening, but would rather do it less frequently, but for longer sessions than those who don't mind lower wear resistance, and doing brief touch ups, but more often.
As a user, I sometimes think I prefer one over another, but I think, since it's ultimately just a balancing act of "how long before I have to sharpen, and for how long until it does what I want", it's actually hard for me to nail down a true preference.
Overall (that is, considered from a combined maker and user perspective), I probably like AEB-L the best, because I have the most experience with it, and because at high hardness (to me 63 is high, I don't typically have it heat treated higher), it keeps its cutting ability respectably, maintains sufficient toughness for knife appropriate uses, and is quick to touch up when needed.
To me, MagnaCut is much the same, just those touch ups need a little more time, but are needed a little less frequently. And I like it very much as well.
Here’s my current neck knife (My Edge-C Spear point design) that gets lots of use on cardboard, blister packs and scoring kydex and its analogs:
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It was getting a bit dull so I gave it a few minutes on the diamond bench stone.