Dunga Gali: A little shorter one than Nathia Gali (in summer even a vehicle can cover a km farther till the actual trek)
More Steep point in the trek
Nathiagali side: you even visit Lalazar Park on the way and some wild life there.
It is about 4km trek from this side.
Valley is more wide in this side and in Nathia gali side mostly you have to trek on a small trek beside the slopes.
And wellcome to PW Dear:)