1984 Presidential Campaign Ads

In these two 1984 presidential campaign ads, compare Reagan’s approach to Mondale’s.

(amara.org links are with captions)

https://amara.org/en/videos/exomwejBI8Lh/info/ronald-reagan-tv-ad-its-morning-in-america-again/
AND

https://amara.org/en/videos/T3a0TIORmhWg/info/walter-mondale-tv-ad-more/

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How does Reagan’s ad depict him and the country at large, and why does it repeat the reference to “four years ago?”