Crowned, have you read Falloon's works on the evolution of the 916/748, "Ducati Desmoquatro Superbikes" and "Ducati 916"? Those books in conjunction with his "Ducati Desmoquatro Perfomance Handbook" list the detail differences for the US and Europe spec 996S and the preceding SPS. The books suggest US spec 996S retained the basic engine with none of the tuning bits from the SPS. Eu spec ones kept 996SPS engine with T1 cams and Titanium rods but included changes from P8 to 1.6MB1 (twin injector version) of the ecu and some odd chassis variations such as a change to the fourth gear ratio. What was fitted to each bike may of course have varied a little during the production cycle but the texts in each book are quite clear for the specs of the bikes through the MYs to MY01. Are you looking at an Eu spec bike?