May 28, 2018 - 6:54 PM
Männlichen to Kleine Scheidegg is more downhill than uphill, so slightly easier. With ample time for photo stops, I would allow 2 hours.
One other suggestion would be to go up to the Jungfraujoch, return to Kleine Scheidegg, and then walk back down to Wengen. You would need to allow around 2 hours for that walk back down, allowing for further photo stops en route.
hope this helps