Digital BW, The Print

I print with an Epson 7600 using QTR. I'm hoping to sometime soon 
acquire a second printer for my color work, thus allowing me to 
convert my 7600 to a dedicated b/w printer with the UT7 inkset. In 
the meantime, I swap back and forth between Epson PK and MK. Is there 
a distinct visual advantage between MK and Eboni black, or is it only 
measurable? 

Thanks for your answers.

Michael 
www.mgordonphotography.com