Distillers make bourbon and other whiskeys from grains, but the primary grain in the mash that’s used for different types of whiskeys varies. A true bourbon comes from mash made with at least 51 percent corn, while a rye whiskey requires a mash made up of at least 51 percent rye.
https://www.leaf.tv/articles/what-is-the-difference-between-bourbon-and-whiskey/
Fact 1: Just 'cause it's whiskey doesn't mean it's bourbon. Bourbon is kind of like whiskey’s “sweet spot.” Because corn is a sweet grain, the more corn, the sweeter the whiskey—and bourbon needs to be at least 51% corn.
http://www.jimbeam.com/en-us/behind-the-bourbon/bourbon-vs-whiskey
All bourbons are whiskey, but not all whiskeys are bourbon. Oh well. For a whiskey to qualify as bourbon, the law--by international agreement--stipulates that it must be made in the USA. It must be made from at least 51% and no more than 79% Indian corn, and aged for at least two years. (Most bourbon is aged for four years or more.) The barrels for aging can be made of any kind of new oak, charred on the inside.
http://www.straightdope.com/columns/read/1654/whats-the-difference-between-bourbon-and-whiskey
Whiskey comes in a variety of flavor profiles, from dry and spicy to light and mellow. Although bourbon can be called a whiskey, not all whiskeys qualify as bourbon. Traditionally made in Kentucky, bourbon is now produced in many regions of the United States.
https://www.leaf.tv/articles/what-is-the-difference-between-bourbon-and-whiskey/
No matter how you spell it, whisky/ey is an umbrella term for a type of spirit distilled from a mash of fermented grains. Now let’s look at some different types: Within the broad category of whisky/ey are many sub-categories, including bourbon, rye, Tennessee, Scotch, Irish, and Canadian style whiskies. The manufacture of each of these types of whisky/ey is guided and regulated by the government of the spirit's country of origin. As a result, Canadian whisky, for example, is a whole different animal from Scotch whisky, Irish whiskey, and American-style whiskeys such as Tennessee, bourbon, and straight rye. (Okay, so far, so good. Maybe at this point, you’d be happy to enjoy a glass of the stuff no matter how it’s spelled.
http://www.thekitchn.com/whiskey-vs-whisky-whats-the-di-100476
By Christopher Osburn. You've probably heard it before: all bourbon is whiskey, but not all whiskey is bourbon. If you're a whiskey (and especially bourbon) drinker, you need to know what that means. By definition, whiskey (or whisky, in Scotland) is a spirit distilled from fermented grain mash — grain varieties include wheat, rye, barley, and corn — and then aged in wooden barrels. Whiskey is made all over the world and there are many popular styles including Scotch whisky, Irish whiskey, and American whiskey.
http://www.mensjournal.com/food-drink/drinks/what-exactly-is-the-difference-between-bourbon-and-whiskey-20140905
Fact 3: From barrel to bottle. The only thing that can be added to bourbon is water (and only to bring it down to proof). Other whiskey makers can add colors (often caramel) and flavors to their products. But then, they can’t call their whiskey bourbon.
http://www.jimbeam.com/en-us/behind-the-bourbon/bourbon-vs-whiskey
Taste the Difference. For the consumer, the flavor is the most notable difference between bourbon and other whiskey varieties. Bourbon has a robust sweet flavor with a mellow spicy bite, much different from the drier, spicier flavors of rye or Scotch whisky.
https://www.leaf.tv/articles/what-is-the-difference-between-bourbon-and-whiskey/
Barrels used for bourbon must be new and made from charred oak. A straight bourbon requires two years of aging and can’t contain added flavorings or colors. Other whiskey varieties, such as rye whiskey, have similar distilling and aging requirements, although the age and material used for the barrels varies.
https://www.leaf.tv/articles/what-is-the-difference-between-bourbon-and-whiskey/
Though generally speaking, I'm more of a cabernet drinker. All bourbons are whiskey, but not all whiskeys are bourbon. Before I go on, Canadians and Scots spell it whisky and the Irish spell it whiskey.. Most U.S. dictionaries prefer the Irish spelling, but the U.S. Standards of Identity for Distilled Spirits, Congress spelled it whisky.. Oh well.
http://www.straightdope.com/columns/read/1654/whats-the-difference-between-bourbon-and-whiskey
what is difference between whisky and bourbon
The flavor is the most notable difference between bourbon and other whiskey varieties. The flavor is the most notable difference between bourbon and whiskey.