Betta Fish: Difference

My betta sprinkles has really flourished in a better tank! The first picture is from December 28th and the second is from today. I think I see a major difference in his color and his fins which I was really worried wouldn't grow back but he looks really good! He's a veiltail so I hope to see some more improvement with his tail but for now he looks really happy and I just wanted to share 😀