In the case of the Pantani bike, it turns out that old race photos from that year show him on alloy, rather than carbon, Ergopower levers.
It's definitely been modded since the tour.
As I recall, the famous tour bike was with red Time Titanium pedals and a PMP or Selcof seatpost as the campag one wasn't ready in time). The Ti Record seatpost came out the same year as carbon ergo levers (1998) so this is likely an pre-production or early production model. Alloy Record levers were only available in 97 and they are very scarce these days.
The frame itself was notoriously fragile, with numerous breakages - considered to be a one-season frame within the trade.
A "replica" bike came out in a limited edition with nearly identical spec a few months after the tour.
Completed: 94 Stumpjumper w. M733; ; 92 Dave Yates 731 ; 97 Parkpre Pro-Elite ; Pace RC200 F6 ; Pace RC300; 82 Gios Super Record ; 97-8 De Rosa Giro D´Italia; ; Banani SPX Track bike ; 89 Alan/Mavic Cross Bike ; 05 Focus Cross Team ; 90 Look MI-80 all-Mavic ; 12 Focus Izalco Team/custom build ; 11 Focus Thunder Custom build
Projects : , Brouwer all-Mavic
Stripped : Pace RC303
Gone : GT Karakoram
Stayed in the family: Kuota Kharma, 04 Stumpjumper FSR
Ceased to be : Dynatech MT3, killed by corroded seatstays.