As for first press or not, you cannot really tell except by comparing two items of which you are sure that they are not the same press. The barcode stays the same in 99.99% of the cases. Also the year of release, although pressed in 2001 for instance would still say 1992. You can look at the center of the CD and compare that with other issues.
You mention XLCD 110 which is the normal catalogue number for The Prodigy Experience. This is an XL-Recordings catalogue number. You also mention that it's on Warner Bros. which means that you have the Warner Bros. release which comes with an XL-Recordings catalogue number. In short, you have a normal retail release as released on Warner Bros.
A lot of countries have their own label. Some labels are in various countries. To mention a few labels on which Prodigy have released items: XL-Recordings, Mute, Maverick, Elektra, Torso, Koch, DeLabel, Avex Trax, UDP, et cetera. For a collector, owning one of each country can be fun, just to be able to spot differences and all. For instance the disc itself might have a different color, or the sleeves are darker or lighter.
Crazy people those collectors... ;p