It depends a lot on the options specified in the order. From what I've seen, they're about the same -- a bit over 27000 pounds for a base model with light seats and minimal options. Maybe the XD40 can come in a bit under 27000 if you choose standard windows, non-opening? If you drop A/C, you save a few hundred pounds, but does anyone do that anymore, other than far northern and a few Quebec operators? The low floors do not get the same ventilation as a New Look, so weather that may be tolerable in a Fishbowl would be unpleasant in a low floor. Also, in cold climates, there will be auxiliary heaters and perhaps extra insulation that would add some weight back, I think.