White oak barrels also serve another purpose; beer and wine has oils and about 7%of bad alcohols including methanol, the charred oak barrel reduces the percent of bad alcohol and oils which are in large part responsible for hangovers. I suppose charred oak cubes might do the same, and since it doesn't have to be watertight then perhaps cubes of red oak could be used as well instead of more expensive white oak.
Maybe all those barrels we see in the breweries, wineries and distilleries are just props and they are actually using cheap red oak wood chips?
All I know for sure is the results I get using my white oak barrels; I start with the best product I can come up with, you can't make a silk purse from a sow's ear, and after it comes out of the barrel it is so good I get real greedy with it.