^ The difference being that Central Library's sails are on the north side of the building, meaning they can be oriented perpendicular to the windows to impede glare without directly obstructing the view (the cable support structure is also nearly imperceptible). In contrast, the Embassy is wrapped on every side
but the north in a spiky curtain of expensive ethylene tetrafluoroethylene which was originally supposed to incorporate photovoltaic cells but doesn't. The frame that holds them in place also seems excessively bulky.
As a result, instead of generating energy as intended, the curtain mostly just obstructs what would otherwise be a fantastic panorama of London and the Thames.