Yes but i read the indictment core parts and the 'obstruction' charge is for 'lying to Congress' so it is two writings of a single action that must be adjudicated and decided by a jury of 'did the gov't prove beyond a reasonable doubt Comey lied'.
And lets put forth the worst case scenario and flip the IG findings to saying 'they thought Comey was the one misrepresenting but they could not conclude it was deliberate',... even under that most juries would not convict, as it is hard to be so sure, even if you think Comey did misrepresent, that he did not do so mistakenly.
As it is not against the law to make a mistake and be wrong and even if a jury does not think that is the case, the question that catches is the lack of proof. They do not generally convict on 'feels' for this.
I think this DOJ lawyer faces the real chance of the judge kicking this out with prejudice and referring the lawyer to the BAR disciplinary panel and being disbarred over this. I think what might save the lawyer is that the case is kicked even prior to the judge doing that, for this US Attorney not being legally appointed and thus the prosecution voided. Typically the DoJ could bring that back with a proper official (Todd Blanche started signing everything for Alina Habba in the same type ruling) but since Comey's case would be beyond the Statute of Limitations, it cannot be refiled.