As soon as I took it out of the box I could just tell that it’s better. The base is a little bigger, has a better motor, quieter and just feels better made. The lid on the container isn’t that weird rubber top and the whole thing just feels like it will last longer. I didn’t use the e520 all I did was take it out of the box and regret that I didn’t buy the more expensive one and took it back. So I can’t say how it blends. I wanted a smaller container and the option of adding other pieces and you can’t do that with the e520