First of all my dear friend COUNT the teeth form your ring an pinion

sor some unknown reason to me I have came accross 3 ratiow
4.44 the dizel ratio, that... a friend of mine found it on its 3door
4.777 that Gary says that is the most common
and in the books
I have foynd an other ratio 4.64 or.67 dont remember well..

OH and the greek diff is buletpruf.. Never had the money for it but a friend of mine has it wi no problems.

One thing he learned by experience.
the guy had many diffs for sportage made, so without taking any new mesurments he fabricated one. Didnt fit because the "cone" was not the same as the other sportages.

So if you want to be 100% sure you send your complete diff for him to assemble and then fit it to your car.

Contact page is here
http://www.protrack.gr/contact.html
use any online translator and I think you will find your way.