For rail fans there are so many differences. For AAM JANTA, there is only one difference - 'Free' Food and 'Paid' Food. Hell now the coaches are also same - LHB red coaches for RAJ as well as many AC exp.
For eg. My family cant tell diff between AC exp & Rajdhani unless they read the Train board. The do not know what is 'priority', 'loco link', reg. fare vs flexi fare. etc.