El Dorado 21 Year Old Special Reserve

Back when I was into my rums I really liked this one. So rich and full bodied. Worth twice the price of its 15 year sibling though? I thought not initially when i had tried them separately however once I tried them together and although I thought I didn't I really did prefer the 21 over the 15. It had a perfect balance and the alcohol burn came through as pure spice. Was 3rd favorite behind Zacapa XO and Diplomatico 2001 vintage