If I were to rank on SQ alone for each device/rig I had owned previously when driving armature iems, it will be (in descending order):
Whipmod + Pico Slim: 8.5/10
Teclast T51: 7/10
iPod + CLAS + Pico Slim: 7/10
Studio V: 5/10
Sony X1061: 4/10
***Note: The SQ ranking above is based on an imaginary composite function that takes into consideration not only the highly subjective element (my own personal preference as a result of the sound signature presented to me due to not only the player but also the pairing with the iems I was using) but also technicalities. For instance, I personally prefers the sound of the RWAK100 and the Whipmod + Pico Slim rig over the DX100 but I will have to give due credit for the technical prowess of the DX100.
However, when it comes to how much I actually end up using it as a portable player on the road (the desire to bring it out of my home and also to take it out from my bag and use it), it will be (in descending order):
1) RWAK100 (100%)
2) Teclast T51 (80%)
3) Whipmod + Pico Slim (80%)
4) Sony X1061 (80%)
5) Studio V (10%)
6) DX100 (5%)
7) iPod + CLAS + Pico Slim (5%)
As this thread is on the AK100 (which I believe there are many more AK100 users than the RWAK100 users out there), an in-depth comparison would be helpful for any attempt to port over the impressions of the AK100 onto the RWAK100. Otherwise, it might be safe to separate the two as of now.
Mike did mentioned that he was impressed with the pairing of the AK100 with the LCD2 but criticised the AK100 otherwise for sounding cold and lacking dynamics. I am not sure if he will call anything with a relatively flat output response to be cold sounding (since nothing is being exaggerated). If anything, the RWAK100 is one of the most dynamic sounding DAP I have heard. Perhaps the pairing of the AK100 with the phones he used were poor due to the high output impedance.