My thought - $4.45 to Elizabeth plus $7 = $11.45. When you get off of the train, you have to pass your train ticket through ticketing gates to enter EWR. There is no way around this. If you do not have a ticket, as happened to me once when the conductor did not collect my ticket and I wanted to save it, you will have to pay the fee right there. So, I think that the difference in price is just the $7 fee.