Digital BW, The Print

So, Epson 1400,1800 and 1900 are all 1.5 picoliters, 6 inks colors,right? Means
UT14 can be used in any of them,is that so? I ask because on MIS web site, UT14
checkmark is only for the 1400. And 1800/1900 are easier to get here in
Brazil,though more expensive...
I also understand that UT 14 does not produce the most detailed prints for it
uses only one black. So currently what would be the best inkset for the
1400/1800/1900 considering the most smooth/detailed print is to be achieved? 
Does the UT14C plays any role here?
Oh, and I love to print on Ilford Gold Fibre Silk...
Gonna have an aspirine...