what is the difference between 14kt gold and 14k gold and what one is the better gold

Both are the same thing

Thank you for using the Jiskha Homework Help Forum. In addition to the answer you already have, look what might happen if you don't distinguish between lower and upper case! Any good dictionary will have abbreviations for you.

kt = karat, knight, knot

KT = kiloton

kiloton = 1 : 1000 tons
2 : an explosive force equivalent to that of 1000 tons of TNT

k = karat, kindergarten, king, kitchen, knit, knot, koruna, kosher — often enclosed in a circle; kyat

K = [New Latin kalium] potassium; Kelvin, kilometer