They’re not similar at all — not in NJ, at least. Absentee ballots must be requested ahead of time, positive identification must be provided to get one, and they are required to be returned within defined time frames. The mail-in ballots were sent out in mass mailing, did not need to be requested, no mechanism was provided for verifying identity, and some states illegally altered deadlines for when they could be returned.
So while that ruling narrowly applied to absentee ballots, with their stringent requirements and safeguards, don’t you think that the SCOTUS would apply the same reasoning to far less secure mail-ins?