Recent article on Greek poet Cavafy is a nice case in point. It takes three translations of “The City”, one of his most well-known poems, from Edmund Keeley & Philip Sherrard, Rae Delven and Daniel Mendelsohn, and gives them each a spin. For me, it's hands down Delven:
You will find no new lands, you will find no other seas.
The city will follow you. You will roam the same
streets. And you will age in the same neighborhoods;
and you will grow gray in these same houses.
Always you will arrive in this city. Do not hope for any other –
There is no ship for you, there is no road.
As you have destroyed your life here
in this little corner, you have ruined it in the entire world.