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@Olly398
Further information following a few enquiries, and a final price drop before the fleabay
They are both hollow-spindle (hollowtech) types, with external bearing cup bottom-brackets. I.e. the bearings are contained within the cups, outboard of the BB shell. Stiffer and lighter than traditional setup. "Compact" means small inner ring, to help get up hills.
They fit standard BBs, but must be used with compatible cups (supplied).
The campag one is supplied with genuine campag bearing cups in British thread.
The FSA one is supplied with genuine GXP/Truvativ/SRAM bearing cups in Italian thread.
If you need a different threading for your frame, you just need different threaded cups like these campag ones or these FSA ones.
New prices
Campy £95
FSA £70
cheers