Mai 1 - flesh is yellow in color, very sweet, crunchy, medium to large fruits
Mai 2 - flesh is yellow in color, fruit very sweet, crunchy, medium to large fruits, tree is "smaller"/more compact than Mai 1 & Mai 3
Mai 3 - flesh is orange in color, fruit very sweet (and possibly the strongest/fullest flavor), crunchy, small to medium fruit
Anything other specific info you are looking for ?