As far as I can tell they've cashed in on the buzz generated by impossible foods, who genetically engineered yeast to produce a plant heme so their meatless meat products taste and cook more like meat.
Beyond Meat just appears to have come to market first, and such gotten more attention. I've tried it a couple times, it was just ok, and not much better than most other decent veggie burger patties. Not groundbreaking and not worth more money than any others.
I haven't tried impossible foods yet. Looking for them.
As I said, beyond is just a veggie burger with a slightly better recipe than the last guy, cashing in on the buzz impossible created before they could come to market.
And now wonder - impossible had a novel product. Beyond has a veggie burger.