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3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
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Moderation policy: Light, mostly invisible
It depends more on how much time you want to spend on post processing and how detailed the part is. Teller layers means more time spent filling and smoothing.
You can print at .2 layer height with a .6 noz and benefit from a thicker line width, giving you stronger parts but the overall time to print will still be similar compared to a .4 noz.
OP wasn't asking about layer height, only nozzle diameter.
They're interrelated, and important to talk about together in this context. Sometimes it's more useful to look at what the asker is trying to accomplish than simply answering exactly what was asked.