Digital BW, The Print

First thanks to all the people in this group who make continuous 
contributions, making life easier to those of us more technically 
challenged or simply with less time to experiment. We listen even if 
we can hardly help.
Question is: I want to move from refilling cartridges to a CFS 
system. I am using VM MIS inks, with Generacions Enhanced black. 
Noremorecarts CIS is considerably more expensive (empty) in the UK 
than MIS CFS system. Is there anything that justifies the price 
difference? One that gives less problems than the other?
Thanks