floresta:
I agree they look alike on the surface. Hope what's under the hood are the same. One has DFRobot on it and the other doesn't.
If the counterfeiters were worried about being sued for their practices they might have changed the board layout and some of the pin connections but I doubt that is the case. They probably just copied the board layout and stuffed it with less expensive components and/or had it assembled by workers in a lower pay grade.
Don
Excellent points! That indicates to me open source hardware only works best when we have a more consistent pay for same skills across the globe.