I doubt it....they are nowhere near the same kind of receiver.
But Brown has made more plays in preseason than just about any receiver I can remember, AND he has lit it up in practice as well. Last year the big name at WR was Holden but he didn't do anything like what Brown has.
Very good chance that Pickens is not around next year....so we would be looking at Flournoy as the #2 and we really wouldn't have much behind him if we let Brown go. Brown has done more than Mingo as a WR and I would start him if it was a choice between the two.