Small block mileage

The 318 has never been known for good mileage. All else being the same what is the real difference between the mileage potential on the 318 and the 360?
318s get easy mid twenties gas mileage.
Careful tuning will get you more.
360's are a hair behind, one could argue about a 8 mpg diff, based on heads n stroke.
Are we talking pre big rod motors or ?
The early 318 'light rod' might get a c hair more mpg's. Jmo