Chivas regal 12 and 13 are both Scottish whisky brands, and their differences are as follows:

1. Brewing years are different: Chivas Regal 12 is smoked by mud coal stove, and Chivas Regal 13 is added by a new method.

2. Different tastes: Chivas Regal 12 is rich and balanced, with strong vanilla and oak flavors and some fruit flavors; Chivas regal 13, on the other hand, has a more complicated taste, with obvious malt, fruit and pepper flavors and a stronger taste.

3. Different prices: Chivas Regal 12 is cheaper than Chivas Regal 13.

Generally speaking, Chivas Regal 12 and 13 are excellent whiskies, and the difference lies in the complexity of taste and the price.