I do not have nor have I used the es100, but I 100% recommend the qudelix. It has Geq and Peq, and the app is excellent, millions of light years away from any portable competition (like Fiio for example), you have a lot of other parameters to configure. You can tell that the team is very good since the product is a few years old and they are still always improving its capabilities. For example, they recently added an improvement to be able to handle the playback of a song when you are using it via cable. This is fabulous because the iPhone does not have physical buttons for play/pause, back and next, and previously it was only possible when used with Bluetooth.
It is also cheap (100 us), and its measurements show that it is well made.
In short: buy the qudelix and be happy forever
(and only if you need more power or a nice volume knob, buy an external amp and use the qudelix as a dac)