Well, it was more than that. Sessions was accused of using, and shown to have used, FBI resources for his own personal purposes.
...Sessions's future was thrown into doubt earlier this year when the OPR report found that he had abused his office by setting up official appointments to justify charging the government for personal travel, improperly billed the FBI nearly $10,000 for a fence around his home, and refused to turn over documents on his $375,000 home mortgage, which investigators said they suspected involved a "sweetheart deal."
...The OPR found, for example, that Sessions bumped security agents off FBI planes and forced them to fly commercially so his wife could accompany him at government expense. FBI aircraft were diverted to pick up Alice Sessions in other cities and FBI vehicles were employed to take her to get her nails done, shop and pick up firewood.
Most troubling to administration officials was the OPR finding of a "sham" arrangement to claim a tax exemption on the value of his chauffeur-driven FBI limousine to and from work. Sessions had received a legal opinion from the chief FBI lawyer that he could use the exemption if he carried a firearm or kept one in the limousine.
I don't think anyone could compare Sessions firing with what happened to Comey.