This pair of cores is useless because you can do the same thing with the first set of cores and was added to the program from commercial reasons only.
a second and redundant pair of cores (PHP 5.3 and PHP 5.2) for IonCube 7, similar with the ones above, provided with older loaders that can decode only IonCube versions lower than 8.It decodes also IonCube v7 and v8 with pieces of code missing. a core for IonCube 8 PHP 5.2 (known as NWS core in older decoders) which can decode very well, with only a few errors, IonCube v6 and earlier versions.
a decoding core for IonCube 8 and PHP 5.3 that can decode all versions of IonCube (v8, v7, v6 and earlier versions).