Krishan, you are right intoxicating effect is caused by alcohol which is produced by the fermentation process.
In fact both the wines are good for heart but red wine is considered slightly more beneficial. The difference in quality is, of course due to difference in the quality and colour of grape. But basic question remains, that eating raw grape (white or red) is not the same thing as drinking red and white wine. In both cases the raw material undergoes chemical changes and I need not to tell you that chemical changes involve changes in basic properties also. That is the difference.
There is of course qualitative difference between red and white wine. That is why red wine is served on room temperature and white wine is served chilled. Red wine is taken with red meat and white wine is taken with white meat or cheese. I have never gone deep into this. On google, you may find detailed description of these wines and their difference. I am telling you only as a layman and not as connoisseur. My information is, therefore, subject to questioning. Your queries and questioning are always welcome.
