Hopefully but more important then that is you at least did not imagine it. 

Recently I compare my 10 years old CDP with my new toy, a transport with a designer name and price tag which I believe was miles better. When both are fed into the same processor DAC and volume adjusted within 0.5dB, they sound disturbingly similar.

 

OK. Maybe the newer toy which I have paid for fully is still that bit better. Would you be impress if I says I could tell them apart if un-blind only. If you point your finger at me and says I must be deaf........using my scientific brain ......I would say that is very possible.

I am not implying you are imagining CDPs sounds different. However, you need to explain why you believe SBT/DBT is not useful when comparing 2 things by ears.