I would recommend Steam due to poor localisation of Origin.
It was not possible to play Origin games in a different language than the one supported in your download area.
Namely Dragon Age which I started to play from the DVD in english but was only able to play it in german after Origin registration.
Had lenghly discussions with Origin support, but they were not able to solve it.
Finally I bought a second copy in a Steam sale.
Another plus for steam is support of Apple and Linux for some games.