Not in Essentials:
Investment Buys & Trades & Evaluation reports - you only get basic summaries.
Direct Bill Pay from within the product is not supported from Quicken Essentials
Does not support QIF
Will not track multiple properties, rental income, or rental maintenance cost
Monthly/Yearly Forecaster function not included
Life savings planner not included
Tax Planner not included
Home Inventory not included
Cash Flow Forecast not included
Debt Reduction Planner not included
Check Printing offers more limited choices
Those are the differences.