A lot of it depends on what you have your spinner set at and what juice delivery system you use.
If you have your spinner set high, you will notice a big difference but if you're like me and keep it between 3.6 and 4,3, you won't notice a big difference. Also, use ce3 or nanos with the 78mm and you'll get more vapor than using a carto
After a year, I still use my 78mm on the road and spinners at home.