Hahaha
Sometimes it gets difficult to do blind test when you switch between source. I had similar experience when I do quick switch between SMSL SU8 and Mojo using ROON and changing between RCA AND BALANCED with click of button in MY Liquid Platinum. Initially I couldn't hear a difference between 2 but if you listen to a new device for long time and you have been long time listener of Mojo you will notice few key changes among devices like more impact in Bass, better Vocals and imaging. Some device will sound thin compared to Mojo and in better recording you will find mojo providing better imaging, depth compared to cheap DAC. But rest assured if we do quick switch we will struggle to hear difference. Only long listening and making notes help in my perosnal opinion. Only when you use a device for long listening you may feel that you are missing your older device. If you get that feel then rest assured your previous device sounded better.