fountainpen vs pigment liners

Got to thinking about the inking the other day. Most proper manga artists ink with fountain pen and one or two different nibs. And of course everything a Japanese do I have to do as well, so for years I fought the never ending (epic) battle to master this tool. Not very successfully.

Why is it so hard? Why is it that I, who have seen in real life how it's done at the studio in Japan (burn nib w lighter, dip in ink, ink with whole arm; don't move the wrist too much, instead rotate the paper) still can't do it right. It's very frustrating when you know just how you want your pictures inked, but it _does not happen_ the way you want it too!

So instead as of late (last year or so) I've decided to go for result rather than practice and befriended the pigment liners - or what do you call them? markers? You know those with different size filt tips ranging from 0.05-0.8 or whatnot.

Note result: 

Fountain pen w Japanese nibs

Pigment liner size 0.3

Is there a difference? Is it all in my head? My feeling is that fountain pen lines are more shaky, more clumsy and less refined, while if I use liners, I have a lot more control and "sketch" out the lines. The frustration would be that it takes a lot longer and put a lot of strain on the arm/hand as you have to go over each line several times.

A friend once told me this inking technique is a very shojo approach. I think that might be bs (sorry) though I have no substance for that claim.

Then again my sensei at the studio also told me that any material and tool is fine to use when you draw manga - be it toilet paper if that works for you - as long as the result looks ok.

But it's interesting. 

And maybe one day... one day when the world is brighter, I will master those nibs!