Which sentence best describes the difference between the statements

Both speaker talk about the need to increase bike lanes, but the first one says about the polls that have been conducted, according to which citizens feel safer, while the other one states the source, the study study by mayor's office, according to which air pollution is a reason. It can also be said that there are different topics, because the first statement is that the bikes are safer, while the other one is about pollution, but in both cases the same fact is about the increase in bike lanes, which in both statements would be the same conclusion.

I would say they address different topics.

after the roman empire, the catholic church began to unify by taking on many duties of a government.