The author likes either of them. In his view, the Tern is an eye catcher, its good quality is visible everywhere. But it does not fold as small as the Dahon, which is a major inconvience when taking it along on Germany`s ICE express train. He finds the quality superior and he is full of praise about it.
Any Brompton friend, however, will notice, when it comes to folding size, neither the Dahon nor the Tern can beat the Brompton.