Yes that is normal, that is because of different ring gear diameters.
Originally Posted by Kerndone
Manufacturers really don't do anything...it has to do with the size of the R&P. Different diffs have different sizes of ring gears and pinion heads and that comes through in the gear ratio. Anything within a 1% difference isn't anything to worry about (general rule of thumb).
'98 Sport, 4.0, 5-speed, D44, 3.73, stock w/ 9k original miles
Gone - 2000 Sport, 1987 YJ, 1997 SE