I Had the 20mm for a week and exchanged it for the 14-45mm lens because i was missing the zoom too much ^^
I Tried reproducing the same footage to compare low light performance. You will get a good idea even so not all movements are in sync
The 20mm video had a tiny less ISO noises and clearly show more details in darker areas
If I had to choose one lens: it would be the 14-45mm lens since zoom and wide angle view are on my priority list. But if low light and compact size is your priority, 20mm is what you need
Hope this help
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