I agree with Aesir, it really doesn't matter which type to choose as long as it meets the requirements set and has acceptable parts support.
Iceland has its own requirements and from that list I think the Coast Guard will have to choose between 3 types and they are:
the EC-225, EH101 and S-92.
I think that the S-92 and the EH101 lead the EC-225 in case of range in high winds. Those two can carry a lot more useful stuff (like Go juice, jumper cables and laughing gas) than the EC-225 and that must count in the SAR environment.