I just recently switched from 415 to 464. The major differences that I have found are in the pouring temp. I can treat and wick the 464 like a paraffin wax, which I love because it cuts out waiting time. I heat the 464, just like I heat the 415, to 185, measure my f/o out into my pour pot and once it's melted, I pour into my pour pot. Give it a good stir and let it sit only a minute and then pour into my containers. I also use this wax in tarts. It's awesome. With the 415, I would have to wait until it got slushy before I would pour it into the containers. Which also means that I would use more wax to fill the same container with the 415. I used to use 13 ounces of the 415 for a 16oz mason jar candle and now I can get away with 12 and it fills it to the same spot. I realize that's not much but if you making a lot of candles, it adds up. Which means I keep costs down. The other major difference is wicking. I have found that I need to wick down a couple of sizes with the 464 as well. As a result, I actually have a better burn. HTH!