Paper ticket is advantageous over e-ticket. You will appreciate this the first time an airline prevents you from boarding, claiming you have no ticket, until you produce the e-ticket numbers. This isn't an academic problem, I've had it happen over a dozen times now. The onus is on you to prove that the e-ticket exists (and having a PNR means nothing!). Obviously the situation with e-tickets gets better each month, but it is still problematic at times and on some airlines/airports. I was enthusiastic about e-tickets but they simply don't work as well as they should ... be warned and prepared. Given a choice I would pick paper ticket, but generally they cost extra.