actually the differences in headsets (pista vs strada) have nothing to do
with strength.

From Sutherlands:
campy super record pista has a stack height of 33.7 and uses 25 5/32 ball bearings
(and stack height is lower for both upper and lower halves).
Campy super Record Strada has a stack height of 39.1 and uses 22 3/16 ball bearings.

the lower stack height has the effect of lowering the front end of the bike.

The shorter crank arms and higher bottom bracket (not BB drop) are designed
to avoid pedal strike while in the steeply banked corners (up to 50 degrees at some
tracks).

Marty