I thought it was the difference in grain/corn ratio
In order to be called "straight bourbon whiskey" by law the distiller must meet some requirements.
1. The mash must be at least 51% corn
2. Cannot come out of the still at more than 160 proof
3. Must be 100% natural. Nothing but water may be added.
4. Must be aged in NEW charred American white oak barrels
5. May not be introduced to the barrel at more than 125 proof
5. Must be aged a minimum of 2 years.
6. Must be made in the United States.
The fundamental difference between bourbon and Tennessee whiskey is the "Lincoln County Process" in which the distiller filters the whiskey through a thick layer of Maple charcoal prior to placing it in barrels and aging. Also, Tennessee whiskey is not subject to the same laws as bourbon ie. mash standards, proof standards, aging standards etc. etc. etc.
Outcast's initial response to you is just the sort of mean, immediate, unnecessary, gatekeeper-bullshit newbie-bashing that I've come to hate on my own board. But then, somehow, miraculously, in only six posts, you managed to earn it. -nemo
"Around here service is not just another six letter word." -Gaper's Pimp