IMHO healthy Foster > healthy Duke.
Foster & Duke both are extremely frustrating as they’ve both have now had proven injury issues, and questionable all around WR traits, from football IQ, & ability. There is a huge difference between a top tier NFL WR like John Brown and those guys. Brown brings the complete package. Duke appears to be a body frame catcher unable to create his own separation. Foster appears to simply have blazing straight line speed. They are players that have to be schemes into the offense play. It’s better to have WRs who can fit into any offensive play.