Clearly alcohol is a causative agents for OC, especially together with smoking.
With this it is the alcohol in the drink that is a problem and not the color. (IF any anything I would prefer red over white wine).

It does make sense to assume that the higher the alcohol content is the bigger the issue is.
ie 40% vs 11% vs 5%. I would expect that it also depends HOW and how much you drink. i.e. a glass of wine vs a 6 pack of beer. Do you chase our drink with water etc....
Alcohol can irritate/dehydrate oral tissues (again this is more severe for high % drinks). It is also metabolized to acetadehyde (in the oral tissue) which is carcinogenic locally. The more exposure you have orally (both in % and contact time) the more serous it is. I do not think that once the alcohol (in MODERATE AMOUNTS please) is past the oral tissue that it will cause major problems with the oral tissue from that point on because what comes back with the blood supply is very dilute.
NOTE the above seems reasonable but I am not aware of any real trial data supporting this. Neither do I advocate drinking after OC.

M