Deer usually prefer the white oak acorns over the reds, as they tend to be less bitter, although this depends on the overall abundance of the acorn crop. In a lean year, they will eat ANY acorns they can find, with no discernible preference.
A good scouting tip is to find a few big white oaks that are in a remote out of the way place (such as not being seen from the road, field, or building), and see what kind of acorn load they are producing. If you can find some of these, they are the best early season places to hunt as you can find. They don't last for long, but you sure do have some good hunting in the meantime.
One other way to ID oaks without the leaves, is to look at how the main leader branches come off the trunk. This applies mainly to larger, more mature trees. If the leader branches tend to come off at a 90 degree angle, or close to it, then it's most likely a white oak. Reds tend to have more upright angled leader branches. The bark of the white oak is a bit different than that of the reds, but it's a subtle difference that most folks would need a book to determine.
One more point and then I'll end my long-winded response......
A good way to scout acorn trees, is to get yourself a good pair of binoculars, find some oaks, lay on your back and look at the ends of the branches. Try and count the approximate number of acorns that you see within the first foot or so of the end of the branch. If you're not seeing at least 8 to a good dozen, then it's NOT going to be a very good year for acorns. Lat year I spent several scouting trips doing this, and there were one or two, to ZERO acorns on the trees! Not a very good mast year, and the hunting reflected that in the woods.
Offer No Apologies.....
NRA Endowment Life Member