@OP As you are not going for a new vehicle, so first find both in good condition and drive them both. In which you feel satisfied buy it. Because here Honda vs Corolla fight will never end. To some Corolla is good and to some Honda is good. It vary from person to person.
Talking about both used
Drive: SE Saloon is better if you've driven Corolla earlier otherwise Civic is much better in drive.
Comfort: SE Saloon is better. Civic have stiff suspension.
Reliability: Both are more or less same.
Mileage: Again no big difference. It depends on how the previous owner maintained his ride
Verdict: Its purely your requirement and choice to what you opt for
@others please help him rather then confusing him and fighting with each other