The revelation that classified materials were discovered at think tank offices formerly used by President Joe Biden, as well as at his Delaware home, has prompted questions on how the circumstances compare with the seizure last year of hundreds of documents marked as classified from Mar-a-Lago, the Florida residence of former President Donald Trump. Attorney General Merrick Garland on Thursday appointed a special counsel to investigate the matter. A side-by-side look at the similarities and differences between the two situations: HOW MANY CLASSIFIED DOCUMENTS ARE WE TALKING ABOUT? BIDEN: It’s …