The effect of ethanol will always be the same. For that matter, two bottles of 5% beer equal one bottle of 10% wine.
Depending on its fermentation, it would contain different and different amounts of more complex fermentation products. Usually, a fermentation process that is very short (and thereby cheaper) would result in something that could easily cause a hangover. Wild yeast strains also tend to produce a larger variety of undesired substances. Modern distilleries have these removed during distillation allowing for faster fermentation.
In beers and wines, undesired by-products cannot be removed. Modern breweries and vineyards deal with that by using cultivated yeast strains and/or controlling the fermentation environment, resulting in products that don't give you headache.
The amount of hops in standard beers is negligible. Even if there were enough hops in beer to have any effect, hops may not have sleep-inducing effects after all. Apparently, research indicating such effects was conducted in combination with valerian.
The reason for adding hops to beer was its inhibiting effect on gram-negative bacteria. Nowadays, it's mostly added for its 'typical' beer flavour.