Biggest different?
Price.
Additives in racing lubes make for higher heat resistance, lower detergents, higher shear resistance, etc etc. Kinda ideal for constant redlining, super hot engine conditions.
Normal lubes have higher cleaning properties (detergents) but everything else is somewhat similar, except perhaps the heat tolerances and a few other 'less essential' things not normally important to a street going car.
Ixeo is right about not using racing lube on a normal car - but 100km is exaggerated la. For a racing lube on a normal car I'd recommend perhaps 3000km or half the recommended OCI for the normal lube equivalent. Eg - Mobil 1 gold OCI every 10k km. The racing equivalent 5000 or 6000km max.
No matter what street going engines need detergents otherwise carbon, varnish, etc buildup will be detrimental to your engine. Race cars get completely stripped down and rebuilt (usually) at each race so they don't need so much detergents in comparison.