There is a widespread belief that mixing (drink one, then the other) alcoholic beverage types results in faster intoxication and/or worse hangover. E.g. beer, wine, vodka etc. The claim is that sticking to one type is better. Even drinking different brands of e.g. beer is sometimes claimed to cause the same effect.
Is there any truth? Compared to simply computing
volume * % alcohol = drunk amount. Assume time to drink that amount is constant e.g. 4 hours.
Thanks guys for the comments and especially @MikeyC's answer! Despite the poorly worded question.
This is a hot topic among youngsters (which I am unfortunately not anymore) but Skeptics.SE (as I flagged my question to possibly be moved to) would have been a poorer fit there as here are all the experts.