Being "thoughtful", but there is NO differential in the tcase of the Sportage, and you WILL get bind up in 4WD on hard surfaces, and you will get hairy handling if there is > 3-5% difference in ratio even in the loose stuff.

FWIW you are better of having the numericaly lower ratio in the front (ie. 4.10 in your example) and the higher ratio in the back (4.11). (Your post was back to front, idea's right numbers weren't)

Do the math. For every 1% difference in ratios you will be scrubbing one axle one complete revolution every 100 wheel revs, or every 200-250 yards or so. Assuming one wheel grips and the other wheel on that axle slips then through the differential action that wheel would slip two revolutions in the same distance....and we haven't even gone around a corner yet. OK in the dirt, but not even worth contemplating in the dry on bitumen.