There are many differeces:
It is uncontested that Obama was born with duel citizenship, this was not the cae with Arthur.
There are also the allegation of Indonesian citizenship with Obama and Arthur did not have these types of additional accusations in regards to eligibiliy.
There are differences in the details about how one comes to determine how one is not eligible — but the core issue of being eligible or not eligible — is the same.
For example, if one goes to the Supreme Court with these particular “differences” and then they simply decide to not hear the case — you’ve then got the same situation — in which one still “suspects” that a person is not eligible, but you don’t have the proof (in that there was no decision verifying that kind of determination of non-eligibility).
The core issue remains the same — even if the details can vary...