What notable aspect differentiated the Kennedy vs. Nixon debate presentation?

The correct answer highlights that Kennedy's deliberate planning for his appearance was a significant factor in his presentation during the debate against Nixon. JFK was aware that the televised format of the debate would have a considerable impact on public perception, so he focused on not just the content of his arguments but also on his visual presentation, including his grooming, attire, and overall demeanor.

Kennedy’s approach contrasted starkly with Nixon's. While Nixon was recovering from an illness and did not prioritize his appearance to the same extent, Kennedy’s polished and charismatic presence resonated more effectively with viewers. This visual impression was particularly important, as many people were watching the debate on television for the first time, illustrating how vital presentation and media influence can be in political contexts.

Kennedy's preparation for the visual elements contributed significantly to his perceived confidence and appeal, which played a crucial role in the debate's outcome and ultimately influenced public opinion in favor of his campaign.