From a quality of vessel standpoint, both can be used to make good beer. I have used both over 20 years and find myself using buckets now exclusively. I prefer the larger opening when I want to cram 2lbs of coconut / walnuts into stout that just hit terminal gravity, generally find them easier to clean, and they take up less room in my garage when stacked.
I retire them if they get too banged up on the inside (too many scratches). It’s a judgment call, but they aren’t terribly expensive.
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