The danes seem to have noticed the sun too - it's only around -4 C outside, but the sun on the benches by the water make public spaces habitable again.
Other notable first impression differences between Denmark and Norway..
The letter 'c' has returned to language, rendering words like center (Nor: sentrum, Dan: centrum) a bit easier to comprehend.
Wine and alcohol are sold at grocery stores - no more nationally regulated special shops with limited hours (guess it's harder to control when you share a border with Germany).
Everything is organic (or økologisk) - even the hot dog stands...