I think if one is easier to sharpen than the other, it may have something to do with the sharpening technique of that person. I have always recommended the Eskimo for those without much broadhead sharpening experience, because I have seen them be able to get them shaving sharp with just a file, a diamond hone and an old belt. Some of the Magnus heads we had from the past had harder metal and took more determination than some newbies were able to put out. That may no longer be an issue with them. I have found that it was easier for me to get arrows with Eskimos to fly perfect, for people I set up than the wide Magnus heads that I had an abundance of. I also found that I could get the Zwickey Delta to fly slightly better in the wind, but that could just be something with my arrows. My only personal issue with Zwickys were that I preferred to use slighter stiffer cedar shafts, so I needed 160 grain heads.