Digital BW, The Print

I am considering making the investment in 500 mL of Noritsu Black ink but there are two different versions for two different prices. 

500 mL of Noritsu Black ink for the Noritsu M300 is only $147.

500 mL of Noritsu Black ink for the Noritsu D701 / D703 is $187.

Is there any reason to purchase the more expensive package?  Is it more concentrated or easier to aliquot out for mixing or filling Epson 1440 cartridges or some other reason?  I did not find the answer searching the group's messages.

Thank you in advance.  This group has been very helpful in getting me started in black & white printing.