The difference is that there are actual documented cases of illegals voting (i.e. real evidence of a crime) and anecdotal evidence from people involved in the election process that it was more than a few isolated cases.
Please cite a source showing that "large numbers of votes were cast by illegal immigrants".
Stop arguing over semantics. You posted a snippet of an article that made that claim.
Please cite where in the article it made the claim that "the election machines were hacked"