Exodus may be UK based for home office, but I have always considered it a global tour company. Why would nonUS reviews not be sufficient? What more information do you need?
I took a peak. Looks pretty good, but just as a suggestion, perhaps consider what thje priority is....Greenland or Labrador? There is a Cdn ship that leaves Quebec City and does the mail drops in many ports of Quebec and Labrador, or do a drive trip of Newfoundland with some of Labrador by road.
I only know of land tours people have taken of Greenland and that was entering from Norway (I think).
A quick google search shows numerous companies, often from Canada, offering Labrador/Greenland combos...for comparison.