Earlier quoted context omitted.
I buy grass-fed beef from my neighbor. There's no difference as far as I can see. I like to support my neighbor, but there's no magic, no difference cooking, no startling color-change tricks as reported elsewhere in this thread.
We have opposite experiences with pork and poultry. The meat we get from local homesteads are noticeably way better than store bought. Maybe beef is a different story. I don't know... During 2020 summer, we raised 4 peking ducks in our backyard. We gifted some of the processed meat to extended family members. And to this day, they still can't stop talking about how good the meat were.
The largest difference at first with beef was that it was grass fed and I was not used to that. But now I tend to buy grass fed beef when I do get it from the supermarket and thus don't notice a big difference vs my farm meat.