** I don't think AC3E shall attract any significant number of SL class pax due to marginally lower fare than SL class.
** The nominal discount is marred by slightly more cramped coach with 16& more pax in same space along with marginally reduced berth size
** IR probably fears, that if fares of AC3 are kept significantly low, than AC3 pax may switch to AC3E and IR may lose the handsome profit being earned.
**...
more... AC3E base fares has been kept 2.4 times the base fare of SL class where as AC3 base fares are 2.6 times of SL class.