Why a Vosper could handle rough Channel seas

Why could a smaller Vosper handle rough Channel seas better than a larger German E-boat?

Its hull and steering characteristics could follow the sea more naturally, while the Schnellboot relied more heavily on power and could lose efficiency when waves met it badly.

A larger boat was not automatically the better rough-water platform. Vospers often did well because their hull form and steering let them move with the water rather than simply force through it. The Schnellboot relied more heavily on power, which could be less effective when waves met the boat at an unfavorable angle. The comparison is qualitative rather than a universal rule, since both families included variations and sea state remained decisive. Usable speed in the English Channel could therefore reverse a ranking based on size and trial performance.