If memory serves (pun intended), both Trump and his family have been known to say “I do not recall” hundreds of times in their various depositions over the years.
The primary reason the Special Prosecutor was able to determine intent was based on Biden’s actions and level of cooperation, which has nothing to do with his mental state and is a stark difference from Trump.
One of the times Trump was forced to actually answer questions, he confirmed that historically stars have been able to assault women and get away with it and then, after saying that he couldn’t have possibly assaulted Carroll because she was a dog, he mistook Carroll for his second wife. That played a direct role in why the jury found him liable for an $83m judgment.
So we can compare and contrast performance when testifying under oath. I still don’t think that reflects well on Trump, for a lot of reason.