Jameson Whiskey Ingredients

Why is the softest Jameson Whiskey Jim Beam Bourbon?
I've been wondering this since the day of St. Patrick. I took a sip of Jameson stone sober, did not burn. Each time you take a sip of Jim Beam, is a burn. Is it aging, or the ingredients?
Jameson is second category. Bushmill try. Irish whiskey is triple distilled for smoothness. and aged in wine barrels.
The Old Jameson Distillery