You can't compare two different sites, if the software at one is of a different version or one site has been hacked you are going to get different results.
I don't get an alert at this site but I do at the other, so there has to be a difference.
This is not another site, this same site, just at a different address.
The same files.
Just the site two adrse (two domains)
Or do you not know such a thing?