For everyday cooking and most baking, 1 g resolution is practical. Finer 0.1 g resolution matters when a one-gram jump would materially change the result.
Choose 1 g for general kitchen work
Flour, sugar, butter, vegetables, meat portions, and most bread recipes are comfortably measured in whole grams. A stable platform, readable display, and adequate capacity will usually matter more than an extra decimal place.
Choose 0.1 g for very small doses
Espresso recipes, small yeast quantities, spices, and other ingredients commonly measured below 5 g benefit from tenths of a gram. Check the scale's minimum starting weight as well as its displayed resolution. A 0.1 g display does not guarantee that every tiny load registers reliably.
Do not confuse resolution with accuracy
Resolution is the smallest displayed step. Accuracy describes closeness to the true weight. Repeatability describes whether the same item produces the same reading. For buying decisions, consistent repeat readings and a responsive tare function are more useful than extra digits alone.
One scale or two?
A 0.1 g scale with sufficient capacity can cover both jobs, but many high-capacity kitchen scales use 1 g steps. If coffee is occasional, a general kitchen scale may be enough. If espresso is a daily ritual, a smaller responsive scale can be easier to use.