not really, especially in Biden's case. (Classified or not) documents get shuffled around law offices all the time during investigations. They were probably properly secured the whole time. And if not the chain of custody lands on the attorneys. A box in a closet in Maralago is not properly secured, and not in the hands of legal counsel. These are VASTLY different circumstances, however they will be equated by the right to diminish the actual severity of Trump's actions.