Final answer:
The Social Democrats generally sought reforms within the existing capitalist system and were engaged in trade unionism and legislation for workers' rights, while Socialist Revolutionaries aimed for more radical change, potentially involving revolution. They differed in their approaches to political ideologies, economic policies and social equality.
Step-by-step explanation:
The Social Democrats and the Socialist Revolutionaries differed on several points, but particularly on political ideologies. The Social Democrats often advocated for a gradual approach to reforms to improve the conditions of the working class within the existing capitalist framework, and were also involved in establishing trade unions and passing worker protection laws, while the Socialist Revolutionaries tended towards a more radical approach which could involve revolution and a complete overthrow of the capitalist system. In terms of political ideologies, some socialist parties, like the early Social Democrats, were supportive of a more democratic approach, contrasting with other, more radical parties that were pursuing revolutionary methods. This split in ideologies was essentially between socialism as social welfare and socialism as the revolutionary rejection of capitalism and its economic inequalities.
Both groups tried to address the economic repercussions of the industrial revolution and aimed to improve the living conditions of workers. However, they diverged significantly in their approaches to achieving these goals. This difference is reminiscent of some historical socialist parties that had to decide between social welfare laws and revolutionary action.