Armadillo: most expensive, lets say its a gravel-specific fit rather than a roadie fit. Mrs Cookiemonster said it looked it was stolen from the set of the big lebowski, so thats going back.
Isobaa: sent the wrong item, and their returns process is all manual
Its £30. Difficult to compare with Rapha, as my Rapha merinos are years old and pretty much see-through around the shoulders. Feels a little heavier, and maybe not quite as tight fitting, but I'd still wear it as a base later (and its not "wooly" like Howies merino)
Winners and loosers: