They're similar-looking, though the non-TTC Flexity Freedoms wound up painted blue instead of that rather attractive shade of red. When I said the Freedoms can't handle the curves, that wasn't specifically about derailments, simply noting that their minimum curve radius is far larger than some of the Green Line's curves (and perilously close to the Boylston loop's curve at that). I don't know what that means in practice, whether they'd derail or simply split their articulation in half, or something else. Either way, not even the MBTA is incompetent enough to buy equipment that can't fit the ruling curves. (They may, however, be foolish enough to buy something that has to be extensively modified to fit, with all the teething problems that come with that. You'd have thought the Boeings and Bredas would have taught them the folly of being the transit world's willing beta-tester.)