Tire size

27.5x3 or 26x4 on a full suspension ebike > what are the advantages or disadvantages? and why. I am 65 getting back into biking . Grew up racing dirtbikes and have many years on mtn bikes form hard tails to full suspension. some street rididng some trails maybe alos tow my standup oard to the beach.
Will you get more mileage out of a bateery using a 27.5 tire?
Thanks