Neil
They almost look like two different birds. The first, with the bluish tinge to the coverts, looks like a first-winter male, and the second, with a brownish tinge, is like a female. I guess the first is digiscope and the second is lens.
I don't think these technologies really compete, they are complementary. Even the most ardent digiscoper must admit it's difficult to capture a fast-moving bird. And even the most ardent lens photographer must admit the digiscope has more power.
You pays your money and you makes your choice. Or you pays even more money and get both.
