You're going to find overlap on anything especially when you include things like "both first campaigns"
There's only so much you can campaign on isn't there. healthcare, crime, education, immigration, defence and the economy. You'll find all these things will be pretty important (though some more than others depending on the cultural/economic/political issues of the time)
Were there some similarities in some of the core areas mentioned above? I'm sure there are. Are they massively outweighed by the differences? I would say probably yes. I'm sure you'll at least admit the messaging was worlds apart?