As in the above, we already discuss the burr and blade grinder but the burr has not one kind, there are many types like stainless steel burr, conical burr, and the ceramic burr.
ceramic: the first advantage is it would not be dull over the time. Also, ceramic burr emits less heat during the grinding and would not Crumble the taste of the coffee. These burrs are more costly it you have a bad day they may be a break.
Stainless steel: through this stainless-steel burr you can produce the same size of grinding at less cost but not cheap as you are considered, it’s just cheaper than the ceramic burr only.