Thanks for the reply Larry, they looked and behaved differently, but could always be the effect of light and habitat.
The following species are present (widespread) at one or both sites, or within NE Zambia: Zitting, Pale crowned, Stout, Croaking, Rattling, Tinkling, Levaillant's, Red faced, Trilling, Lazy, Tabora, Neddicky, Short winged.
I think the following can be excluded: Zitting, Croaking, Red faced, Lazy and Neddicky.