That’s the soybean hybrid they went with. There’s a lot of elements to beans… much like apples or pear…. Varieties will have different flavors & attributes.
What most bean breeders have done is breed beans to be smaller & denser. VS larger & softer. Larger & softer tastes far better!! They breed for smaller & denser so it adds weight per bushel. The other thing that’s changed is they don’t breed for “low tannin content” or anything with oil/flavor in most cases. If u can get a more bland tasting bean to yield higher- u will go with that. Last- could be soil differences too. If one guy was far better on PH & macros & micros… beans will taste better. Simple solution …. Get older genetic beans or buy beans that are far bigger. If good bean dealer - they can find those. & get your PH & nutrients right.