During a recent visit to Seoul, South Korea, Nvidia (NVDA +2.30%) CEO Jensen Huang openly praised another artificial intelligence (AI) semiconductor stock: Qualcomm (QCOM +6.09%). Huang acknowledged Qualcomm's success in mobile devices and AI-enabled smartphones, even telling investors to buy Qualcomm stock. This endorsement comes at a pivotal time, as the AI infrastructure boom accelerates demand for specialized chips across data centers, personal devices, and vehicles. Huang's comments quietly highlight deeper strategic differences between Nvidia and the competitive landscape: Not every pocket of the AI realm requires Nvidia's high-performance GPUs. Let's dive into what makes Qualcomm unique and assess whether the stock is a good buy right now, as Huang suggests. NASDAQ: QCOM Key Data Points Why does Jensen Huang like Qualcomm? Huang notes that Nvidia's bread and butter is in accelerated computing for data centers, robotics, and AI infrastructure. However, he acknowledges that Nvidia lacks the same competitive advantages in edge devices -- mobile phones and consumer electronics. Huang said, "I don't think we're incredibly good at mobile devices, and I don't think it's necessary," directing investors toward Qualcomm instead. Qualcomm has demonstrated strong performance in on-device AI for smartphones, where chips must deliver inference while also drawing minimal power to preserve battery life. I don't think Huang was simply being polite. Rather, he seems to recognize that Qualcomm's focus complements Nvidia's strengths -- allowing both companies to succeed in an ever-expanding chip landscape without direct overlap in mobile AI. What is Qualcomm's role in the AI chip stack? While Nvidia's GPUs dominate data centers, these chip clusters typically handle the heavy training required to build AI models at scale. By contrast, Qualcomm's Snapdragon chip platform is marketed toward on-device processing across smartphones, laptops, automotive systems, and Internet of Things (IoT) devices. These solutions prioritize low latency and energy