Is there a difference between Nixon 72 and Reagan 84 coalition?

[Schiff for Senate]

Yes. The white working class was more anti-McGovern than anti-Mondale. College towns were also likely less pro-Mondale than pro-McGovern. There are certainly differences in the two coalitions: rural, ancestrally Democratic counties in the south were much more pro-Mondale than pro-McGovern. And MA, for whatever reason, broke for McGovern by about 10% but went against Mondale twelve years later.

[Schiff for Senate]

Nixon won a lot of large urban counties which haven’t gone Dem since like Hennepin county Minnesota, Allegheny county Pennsylvania Queens NY, Cook Illinois, Lake Indiana, and the city/parish New Orleans.

Which haven't gone Democratic since then? You mean haven't gone Republican since then, right?