Same same but different as Gabor Palotai and Grey Tel Aviv creates.

Everything has been done.
In 2005 Designer Gabor Palotai came up with an awarded poster for the exhibition Estonia at the Sjöhistoriska museum in Sweden. Now, 2 years later Jonathan Stirin and Ben Sever, both employees at Grey Tel Aviv has come up with a set of ads for Greenpeace. The resemblance is striking, but both solutions serve their purpose.
What do you think? Stealing, coincidence or homage? And does it make a difference since the later one is for a good cause?