I have seen Red River crabgrass do well further north, I tried it and it flopped here.
Now I do have African Star, Alicia , Common Bermuda, Agentine, Pensacola, Parguay Bahia and a few other varities I know I am forgetting.
The point is I wasted a lot of money chasing better forage years ago, here Bahia is King or poor man's coastal.
Friend ask me one time what is the best grass for cattle my response the kind that will grow in my pasture.
You can't fight mother nature if the cow can't stay fat and raise a calf on my grass and hay I am changing the cow not the grass.