Quicken Deluxe vs Premier are two editions of Quicken's personal finance software for Mac users, with varying features and capabilities. Quicken Deluxe offers core budgeting, bill management, and investment tracking tools. Quicken Premier builds upon these functionalities by adding advanced features, such as portfolio analysis, market comparisons, and priority access to customer support. Users who require more comprehensive investment management tools and insights should opt for the Premier edition, while Deluxe is suitable for those with simpler financial needs.