3.08 and 3.07 will depend on the axle you're counting teeth on. because differentials come in all different sizes, they have different numbers of teeth on the gears. some axles will have a 3.08, others will have 3.07. just like some have a 3.54 and others 3.55. or 4.10 and 4.11. it goes on and on. designers did their best to get the numbers to be the same.