As a developer tools analyst, I've compared Project A (amundsen-io/amundsen) and Project B (pinterest/querybook) based on momentum, community size, and apparent use cases. Here's the analysis: In terms of momentum, Querybook (Project B) exhibits a higher recent growth rate, having garnered 12 stars in the last 30 days compared to Amundsen's 7, despite Amundsen's significantly higher overall star count (4,754 vs 2,249). This suggests Querybook is currently attracting more immediate attention. Community size, however, heavily favors Amundsen, indicated by its substantially larger overall star count, suggesting a broader, more established community around the project. Regarding use cases, Amundsen positions itself as a comprehensive metadata-driven platform aimed at enhancing productivity across a broad spectrum of data professionals (analysts, scientists, engineers), implying a wide range of applications within data management and interaction. In contrast, Querybook is more specifically focused on Big Data querying with an integrated notebook interface, targeting a somewhat niche but critical use case within the broader data science workflow. Both projects cater to data professionals but differ in scope and current community engagement dynamics. Amundsen's broader appeal and larger community contrast with Querybook's focused application and recent popularity surge.