What I'm about to lay down is not empirical. I have done a bunch of reading and come to a couple conclusions.
Flash freezers and freeze dryers are what are used to freeze weed for things like drying and making live resin. A deep freeze is not a flash freezer or freeze dryer.
If you were to put fresh dope in your home freezer, the cells of the plant burst. When it thaws, you have mushy plant matter. Put a leafy green vegetable like lettuce or spinach in your freezer and thaw it. It's the same thing. The only differences between a deep freeze and home freezer are temperature and size. What's similar is the time it takes to freeze the plant matter bursts cells.
Flash freezers and freeze dryers use fans for evaporation and freeze a lot quicker than just the coils in your home piece. The plant cells don't have a chance to burst. The difference between flash freezing and freeze drying is flash freezing freezes without removing moisture while freeze drying freezes while removing moisture.
Ice is frozen.
Frozen vegetables are flash frozen to retain moisture.
Dogfood, kief, and survival food are freeze dried to remove moisture.