Why jee advance is different from jee mains

JEE Main and JEE Advanced serve as a two-stage filtering system for engineering admissions in India, differing significantly in their purpose, conducting bodies, and problem-solving depth. While JEE Main tests foundational knowledge, speed, and accuracy, JEE Advanced tests deep analytical thinking and multi-concept integration 
JEE Main requires you to solve a high volume of formula-based questions quickly JEE Main includes explicit topics like Electronic Devices or Electromagnetic Waves
JEE Advanced rarely asks direct questions; it twists fundamentals, requiring you to combine concepts from multiple chapters (e.g., mixing Mechanics with Electrostatics) to solve a single problem JEE Advanced drops those but adds conceptually heavy topics like advanced Organic Mechanisms, Coordination Chemistry, and deeper Vector Calculus