Not really. Trump didnt declassify. Its not a magic wand that applies post presidency. Doesnt matter if he HAD the power if he DIDN'T declassify.
There is no real distinction. Trump had higher clearance and more documents. Biden had lower clearance and fewer documents.
Trumps stuff were notes that dont seem all that important except for record keeping. And he fought turning them over, making them a bigger issue than they were. Biden's notes contain stuff about foreign relations. But he readily turned them over, so it never became an issue.
Biden had his for longer. Both kept them in unsecure locations, both will argue the others location is worse than theirs.
The only reason Trumos documents were an issue was because he fought it for some reason. If he let's them go it's a nothing burger.