Compared are the US Version and the European Version.

In all European Versions the name of the restaurant, where John Spartan (Sylvester Stallone) is invited to, has been changed.
In the US Version it's called Taco Bell, in the European Version it's called Pizza Hut instead.
All scenes were originally filmed in the Taco Bell context. This has been changed in the post production for the European Version, the logos have been replaced and the appropiate scenes were dubbed as well. Both groups belong to Pepsi, so it has presumably been changed due to the fact that Taco Bell isn't well known in Europe. On the other hand there are some European Versions where the logos have been replaced, but the characters are still talking about Taco Bell.

The German Version only exists in the Pizza Hut Version.
European Version (German Version) PAL (FSK 16): 1:46:05 Min credits excluded
US Version NTSC (R-Rated): 1:50:37 Min credits excluded

No difference

The US Version on the left, the European Version on the right.
No difference

Here's an example for a botch-up in the European Version where the Pizza Hut logo has been forgotten.