Just because the shoes are one the same last don't mean they will fit the same, it also depends on the type of leather used. Case in point: the McTavish fits larger than the other calf shoes on the same 5 last.
The Neumok defintely fits narrower and a bit longer than something like the Strand based on my experience. This is mainly due to the thicker leather used I think. You might want to size down and go up in width.