Sarah,Two completely different service lines (both within the wider heading of advisory) with completely different offerings.At a very high level, PI is EY's consulting arm, ITRA is an extension of the Audit arm (although it sits within the Risk practice in Advisory). They will likely sell you the ITRA role as advisory work, but it's essentially IT Audit.Many of the ITRA joiners each year attempt to move from ITRA to the Advisory Consultant Programme, ACP, (the PI grad scheme). I know of only one person in the past three years who has gone from ACP to ITRA.Have a quick look at the "IBM or EY?" thread, last updated on 14/12/12, as that covers a few opinions on EY ITRA.My advice, go PI every time.