A number of my knives are D2 steel. Stainless steel that equals the performance of D2 is prohibitively expensive. At least for me.
In the case of Mora knives, the difference in price between high carbon and stainless is only about $6, so, I'm guessing, their high carbon performs better, but they aren't very specific about what their steels are other than some, or all, being Sandvik.
I bought a basic model and it seems good for the price, but I'd definitely recommend upgrading to the companion. I still haven't received my Companion with the heavy duty carbon blade yet, but the stainless I have is finished very well. The steel gleams and no rough edges.
If price wasn't a consideration, would I buy a Mora? Maybe not, but price is always a consideration. I've bought all my knives with the intention of actually using them, but most sit in a drawer because I don't have the heart to get them all beat up in the real world. Mora knives are so cheap, who cares if they get beat up.
The real question for me is folder vs. fixed. The best knife is the one you have with you.