Have both and others like ifi xDSD and Fiio BTR3
I prefer the ES 100 for flexibilty and like the app
How do you want to use it? at the desk, on the go wired or with bluetooth connection?
With which IEMs or headphones do you plan to use the device? are all easy to drive?
Do you use balanced cables with you iems and headphones?
Does your mobile phone support LDAC(Android 9)?