LTNman
Well the trains are certainly far better. Air conditioned, quieter and smoother and the service is far more reliable. c2c are rated one of the best rail operators in the UK and Abelio Greater Anglia just about the worst.
I think the fastest journey time from Southend Central to Fenchurch Street is under 40 minutes whereas from the Airport to Liverpool Street is about 55 minutes, always providing there are no delays, which are an almost daily occurrence, or a replacement bus service is operating over some of the route, which happens on a lot of weekends.