I have built the Tito Neri though the plans are very good and if you want to build as per Graupner then that would be fine and give you a great tug to have, and the control is fantastic along with its power to weight ratio.
I deviated from the build in that I added strength to the aft deck and fore deck to take working winches and anchor winch. I also added motor cooling coils and ESC cooling as well as the fire monitor system (my tug works hard) There are two working radar (different speeds = x band y band)
So you see the scope is great and almost endless (your imagination and money is the limit)

I've had my hands on several Smit Nederland/ Denmarken and that build which I have also over built in relation to the original spec.
I have also built a twin VS (Graupner Parrat) tug this was truly a controlable vessel it can thrust side ways just like the real thing!
I am bias in MY views. You have the choice as to which vessel (s) you decide on getting what I found easy to construct 'you may or may not' what I found 'fun' you again may or may not.
I say to people and I say this to you
What are you looking for?
Is it the controllability
Is it the wow factor = all the gizmo's and bits-Or is it the way I started out and wanted to find out IF I could do it to look and act like the real thing.
on summery then ITS your tug (vessel) it will be your pride and joy it will be yours
Even if it is a kit built vessel it will have your 'stamp' on it and like 99.99 percent of the people on this web forum it will be YOURS to have to hold to cherish to *play with* Oh thats the real fun part

Sorry if I waffle on a bit your the only ones that listen to me (you do don't you?)
R,