It's not only about transparency, but also about the total amount of impurities and their composition. So it's better to drink whiskey than clear rum. But if you do not take the outright shmurdyak, then the influence of impurities is negligible compared to the influence of alcohol and is more manifested in the power of the exhaust and, possibly, in the severity of the hangover
On my own I will say this: colored, colored / opaque drinks ° my body perceives worse. From a sore head to arthitis.
About others: I know two people, one with an ulcer, whom doctors allow / recommend drink only vodka and tequila.