the drivelines are the same and different. all depends on what particular item you're talking about.
a quick way to check gear ratio is to jack up one tire, put the trans in neutral, and rotate it around exactly twice while you count the times the driveshaft spins. 3 and a half is 3.55 while just over 4 is 4.10, etc. if the axle has a posi, then you'd need to jack up both rear tires and rotate them around once.