I think the point is that a car with less downforce will lose time in pretty much any corner (that benefits from downforce), but the longer the straight, the more the car with superior acceleration will make up. If that deficit will be overcome against the car with a higher cornering speed depends obviously on how big the straight line speed advantage is.
Yes, Mercedes was strong at Barcelona at the chicane, but this isn't purely down to Mercedes having better mechanical grip. More so, because Mercedes optimized their downforce through all the other [high speed] corners, they could keep the Pirellis better in the operating window. The Ferrari however overheated them and thus lacked the grip at the chicane. A totally different track (start/stop nature with long straights) will obviously have different requirements to the car. The long straights will in theory help Ferrari's superior straight line performance. Because of less downforce dependent corners, one assumes that the tighter "start/stop" corners could help them better in retaining the necessary tire temperatures and thus not lose that much in those corners.