I don't mean to be argumentative here (oh yes I do
). The Miroku built '73 is NOT Short Stroked. The lever travel is somewhat less than an out of the box Uberti, but by no means is it "Short Stroked." The Miroku does have slightly better machine work but is also somewhat more difficult to set up than a Uberti. Should you have a problem with the Miroku, there are almost NO parts available.
There is a plethora of parts available for the Uberti. OEM replacement/repair parts as well as performance parts. A simple matter to purchase lighter, user friendly after-market springs. Appearance wise, that is subjective. The different importers have different requirements for roll marks. Cimarron perhaps the more authentic.
As far as the calibers running true to size ...... true to size "when??" Some years back the manufactures of .44s standardized on .429 for barrel dimension. For the 38-40, I'm not sure. However there is a specifications page on the Cimarron web site that gives the base dimensions of the guns they sell. You should give that a look-see.
You can't go far wrong with either. However, from the standpoint of a professional Gunpluber, parts availability alone would guide me to Uberti built rifles. Barrel length is subjective. I personally prefer short barrels. 18 inches is nice.
Ah Navy 45, we're a Light House ..... Your Call