Hi!
i think personally, since the recent halinski's models are extreme productions, the Fuso will be one too. but don't get me wrong, this means an extreme detailed model and so a very nice ship when built, but the publisher simply doesn't simplify any details which should be simplified at 1:200 scale(so it has 2x more extreme small parts than needed)
and i think the constructor on answers fuso is the same as at GPMs SHOKAKU (by the way thats an impressive model) + you may purchase for answers fuso lasercut framework, lasercut small parts for superstructure, catapults, bridge, searchlights.....
so i think the answer has more advantages....plus on the one hand it'll offer more pleasure at building it, but on the other hand,the halinskis will offer more pleasure at looking on a finished model;-)
but thats just my opinion ;-)
now to Nagato:
indeed thats a beautifull model, but it's older and i think the design was made in old days style 'by hand', so it has many bad joints...but i've seen one built in past, and the smaller and bigger flaws can be with some experienceces and patience corrected.
regards,
Marko