We do not know what evidence was presented and what evidence was withheld.
Shortly after Comey’s Arraignment, his lawyers will file a Motion to Dismiss for Selective/Vindicative Prosecution.
It will be the most meritorious motion of its kind in US jurisprudence. Comey will be entitled to an evidentiary hearing. Besides Trump Social posts calling for revenge, his lawyers will call the career prosecutor who was fired, Pam Bondi, and any DOJ professional who declined prosecution. Counsel will also call the replacement Crazytown US Attorney who made the charging decision.
Highly unlikely a jury gets the case.