Ideally, having both steel and glass mixing bowls allows you the freedom to choose, dependant on the use. Both types come in different sizes and shapes and both will serve their purpose. But if you are trying to save space or decide which bowl to use, the following information may help.
Stainless mixing bowls are usually less expensive than glass. But you can find higher-end stainless bowls made of quality metal that cost about the same as glass bowls. But glass has the added use of being able to serve food as well as mix it.
Glass is heavier, so pouring ingredients from the bowl into another vessel is more challenging than with stainless, especially with bigger bowls. And even the most durable glass bowls can still be chipped or broken in some circumstances, while stainless steel is chip-proof. It’s similar with appearance, glass can become scratched and become foggy, while steel bowls never lose their shine, though they can end up with a few dents.