No chestnut oak acorns are much larger than any of the other oaks. Also the leaves of the chestnut oak although do have rounded lobes like the white oak have a profile more resembling a horse chestnut or buckeye tree. (narrower at the base and broadening toward the outer end)
The bark on a chestnut oak is easy to identify too. It is very thick with deep grooves and high broken ridges. Do a search and you can see the difference.
The acorns of the chestnut oak are edible by the deer but they don't particularly care for them if there are other acorns about because they are the most bitter.
Now there are some different oaks in the southern US that I'm not familiar with. There is a swamp oak, live oak, pin oak, etc.
I have two oak trees in my yard at my FL house that produce a ton of small acorns about 3/8"-1/2" in diameter and just about as long. I think they are live oaks.