The UK CD are made by Swindon manufactory and European CD are made with Uden manufactory. It exists some printing colours differences. You can find those information under the cd (inner circle)
Some Spice Girls released singles are exclusively printed in France by SNA or MPO manufactories.
Some Italian CD Maxi have SIAE Label added to the design (back cover or cd). For example, Mi Chico Latino Italian Maxi CD has a different font on the cover.
There are almost identical to European CD and printed in EU. Check the ifpi code for Thailand in the inner circle (Ifpi L03X). You can find list of Ifpi codes on internet easily.
They are identical to UK Cassettes but they are released with a jewel protected case. All audio cassettes printed in any countries are different for each national manufactories.
Most of Chinese CD are fake and pirated, you will only find the official ones. Stickered or "Sample" printed on existing releases were discarded. If the cd has a real difference then it has been added.