I don't know if Martial is that different outside of his finishing coming back. On Rashford's goal Martial did something that he often does which is to not shoot from awkward angles and try to find a teammate or control the ball, if VDB doesn't square the ball to Rashford but instead shoots and miss, then Martial is criticized.
From what I have seen during this preseason none of our attackers are doing new things, Rashford is playing the way he did before his injury, Martial is playing the way he did in 19/20, Sancho is playing the way he did from the right for Dortmund as more of a playmaker and Bruno is playing the way he did during his first handful of games for United.
I wouldn't be surprised if ETH simply showed them tapes of their own very good games.