On another note I believe this bike has a lot of the original components, all being xtr, an option for the 1992 explosif pro, even the headset.
The stem even looks correct for 92 explosif pro.
The catalogue I looked up for 92 shows an all black Explosif pro including a black stem and a Suntour XC gruppo. Do you have another one?
But if you look elsewhere in the 92 catalogue, another option for the Explosif Pro alongside XTR was the 'titanium luxury package'. So the bike may originally have had a ti O-Beam and P2s, as well as that ti Velocity. It's tempting to wonder whether, a few years later, the owner may have traded in his ti P2 for that purple Marzocchi. And yet now, 15 years on, those ti P2s are worth many times more than the Marzocchis that he paid extra for!
I rather think you both have Explosif Pros, but I don't think we can be certain of the year without more detailed analysis of the frame sizes. Except of course that if your bike has a 90 serial number, then it is definitely a 91 model.