House has its stylistic origins in Chicago. In Chicago, the black community heavily use gospel and blues as just the vernacular frame for their music. The dances there is the jack and the juke. Because of the history of gospel and blues, there is often a pronounced backbeat that is absent in techno.
Techno has its stylistic origins in Detroit. In Detroit, gospel is in the background―sure―but jazz is much more prominent. The dance there is the jit(terbug).
In house music, it is always one-step. Techno can be one-step or two-step or a hybrid of the two. The variation enjoyed in techno over the number of step allows it to be more consistently percussive than house. The role of the hat in techno is much more important in providing the basis of the rhythm more than the bass drum and the snares.
When we introduce Europe in the question, much of the popular dances there are one-steps and largely have a history that draws from disco and house. The German interpretation of techno has been largely to treat it as a one-step with crosses of Berlin School and Dortmund School instrumentation. Throughout Europe, house largely has a pulsing bassline on the off beat.