Hillary let her server be hacked repeatedly, and classified documents were found on the dark web. One of Hillary's lawyers even had thumb drives with copies of the shit on her server in his office.
In Biden's case, there are a number of e-mails Hunter sent that look very much like reprints of classified documents found in Joke's garage. The ones at the university of Pennsylvania or wherever Biden had an office, were obviously seen by staff and others not authorized to see them.
So, yes, both let people see those documents.
In Hillary's case, yes, she tried to conceal the documents by having them on a private, undisclosed, server. There are numerous previous cases of people copying classified documents, or taking handwritten notes of them and removing those to unsecure locations. That is exactly what Hillary did on her unauthorized server. She was aware of the use of that server. She intentionally set that server up to circumvent government controls on her electronic communications and used it in an ongoing illegal manner to avoid government surveillance of her activities as required by law as a senior government official.