E7 and E11 briefly (with the JH16Pro, yea I know what an overkill. Just
want to make sure I can hear every single detail because both amps are
very close in terms of performance).
1. As I've said, very close voicing, very close signature and
technicalities. (Does the two share the same op-amp? Sounds like they do).
2. E7 is more lively, has better treble, more spacious. The midrange is
more congested and confused though.
3. E11 is warmer, fuller mids, better mids and thicker lows than the E7.
Overall warmer and slight darker than the E7. I like the signature
better but I wish it can be as open sounding as the E11.
4. I can use the E11 to drive a HE-500 till my ears bleed (seriously), I
can't do that with the E7
5. I'd get the E11 just purely because of the mechanical/analog volume knob alone. Getting the volume up and down is a slow business in the E7.
6. No problem with the ultra-sensitive 18 Ohms JH16Pro with both amps.
7. I also tried both amps with the Sony ZX700 and ATH M50. Good sound with both headphones.

I can't find that article, mind providing the link?

if i have it, it will be connected to my pc using ssyycc techflex cable and the other end the SRH 440