Why Norway offered the greater Allied missed opportunity

Between Norway and Singapore, which offered the greater number of missed opportunities?

Norway, because Allied success there could have damaged German sea power, iron-ore access, and U-boat operations for the remainder of the European war.

Norway offered the greater missed opportunity because Allied success there would affect the rest of the European war. A stronger campaign could destroy much of the Kriegsmarine, secure Norwegian air and naval bases, and threaten the Swedish iron-ore route. Radar-equipped patrol aircraft between Britain and Norway would force U-boats to spend more of the North Sea passage submerged, reducing endurance and their effective Atlantic reach. Holding Norway could also reduce the need for the historical deployment to Iceland, although Icelandic airfields might remain useful. An earlier European victory could then deny Japan the opportunity to exploit Britain's commitments there, leaving two more separate conflicts.