What you are tasting is the minute particles of oxidation that rubbed off during the contact with an acidic food.
Due to that, once a patina is established, be it by force or natural use, that tinge of flavor goes away.
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I prefer carbon steel over stainless steel. Though I don't have extensive direct comparison between a mora companion in carbon and stainless, I have used them and own a carbon.
I feel that the carbon takes a slightly keener edge and holds it for nominally longer. That being said, if you don't want to worry about it rusting (stainless can still rust, but more on that in a sec) then you won't be giving up much by going with stainless. I just prefer to see a patina on a blade and it be a reminder of the badges of honor it has earned on our last trip.
Regarding "stainless steel" not rusting... Well, "stainless" is just that, it is able to "stain less" due to its chromium content.
The affect that chromium has on steel is that it forms carbides, large complex ones. For a steel to be considered stainless it has* to have over 13% free chromium (free chromium is not tied up in carbide form). Due to this a decent amount has to be added to make sure they have enough "to spare" to allow it to stay free and have a stain repellent effect.
The downside to this is that chromium, while slightly increasing wear resistance, it does more to lower the toughness of the steel.
Where this difference would be noticed is on the fine edge taking and it's want to deform under impact, in the form of a roll or dent vs a chip.
This is where your preferences come into play.
Since the steel is a "lower end" alloy, and the knives aren't costly, it is highly unlikely that you would see a significant difference between them. I did mention cost in there because I doubt that the company would be able to optimize their HT protocol and maximize the effectiveness of their factory grinds for the $ they are asking.
With All of that being said, I prefer carbon steel over stainless if all else being equal. I like to take care of my knives, and I like them to show that they get used and worked regularly.
Bring along a small container of chapstick, the one that comes in a screw top lid, like carmex. It will stay sealed in hot weather, it is food safe, and will protect your steel.
* regarding the % required to be stainless, some people consider 11.5% to be the cut off, not 13%. But the general concensus is that 11.5%-13% is considered "semi stainless" like D2 tool steel and such.
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Tldr: there is a difference, but it isn't significant enough to over think it. Buy the one you are comfortable with and learn to take care of it accordingly.
Edit: for the money of a loaded mora bushcraft, you can get a Becker BK15. Fantastic ergos, a pouch up front to make your own kit in, and a "better" steel.
I would take my BK15 over my mora Any Day Of The Week.
I used it as a boning knife in a food processing plant that did over 100k lbs of pork a week. It was constantly covered in water, fat, blood, and meat 8-9 hours a day.
This is the result: