Different design goals. A commercial freezer is designed to be able to freeze a larger volume / weight of goods more rapidly, with the doors being opened more

Different design goals. A commercial freezer is designed to be able to freeze a larger volume / weight of goods more rapidly, with the doors being opened more frequently. So they'll necessarily have a larger cooling capacity, which means a higher capacity compressor, fan, and heat exchanger. I think the parent commenter would have been better off with a regular chest freezer of an appropriate size.