My post was about portions, when I said "A vodka", I meant a 35.5ml measure @37.5%, which does have about half the alcohol of a pint @4.7%, and so people will drink more to get to the same level of drunkenness.
I was not saying one was better than the other, I was warning about portion size calculation. Unsweetened spirits & diet mixers are probably the most low calorie way to get to a given blood alcohol concentration, the sweeteners have been shown to increase alcohol absorption rates.
This is an important point I make a lot. Not all calories are used the same by people. I would be interested if you or anybody else has links to studies on this.
To a lesser extent the same would hold true for alcohol. The body treats it as a poison and breaks it down and excretes it. I could see the body using the acetone in lieu of sugar/fat in the body and yes I can see how the insulin spike it would cause would screw with the metabolism, but the alcohol itself has no bio available calories.
So my take(however wrong?) would be that some calories are more bio available than others. So the bio availability in 100 calories of white sugar would be be much higher than in 100 calories of say lean steak?