The discussion centers on the comparative durability of the iPhone 6 and iPad Air when subjected to impact, specifically whether one would crack easier when struck with a hammer. Participants suggest that the iPad Air may crack more easily due to its larger surface area and thinner design, while the iPhone 6 is perceived as sturdier because of its thicker frame and construction aimed at withstanding drops. The impact of screen protectors on crack resistance is debated, with some questioning their effectiveness beyond scratch protection. Additionally, there are mentions of bending issues with the iPhone 6, although reports of such incidents are minimal. Overall, the conversation emphasizes the importance of understanding the physical properties of these devices before making assumptions about their durability.