Full disclosure, I prefer bourbon to scotch. In fact, I prefer a quality rye to both. Of course, though, I wouldn't turn down a good scotch. What's the difference between different whiskeys? A lot. But for our purposes here, just know that they all get their beautiful color from being aged in wood casks; mostly charred oak, but there are some others for special purposes. To legally be called bourbon, it must be aged in a never before used American white oak cask. Bourbon has a bit of a bite, which comes (in part) from the tannins in the fresh wood. Scotch has a gentler flavor profile and, therefore, specifically wants to age in a used cask that has already had much of the tannins removed. Therein lies the rub. Whence does one get used casks? Basically, from other, non-scotch, distilleries. Two favorites: casks from America that were used for bourbon and casks from Spain that were used for sherry. For a long time they just used whatever was expedient/cheap/availabl...
This is a paraphrase of the pasuk in t'hillim 84:7 -- "mei'chayil el chayil" -- which means "from strength to strength". In this case, it is my thoughts and ideas to those who are strong enough to be interested :)