Damien Willemse and Damien Delande vs Chiefs

I expect the combination or lack thereof will determine the results this weekend. 
The Stormers won the game earlier in the season, but at that time the backline was doing well on attack, at least until the likes of 15th choice Don Kriel started playing at inside centre.
Damien Willemse is another youngster with big hype. Great when he has time and space Saturday will, however, be a closer inspection. How will he react against the bigger backs, and less time-space- especially if Delande goes on a walk about. 
The revolving Delande has ditched the space boot and seems to be getting back into form. He started this season off very well, but then had 2 injuries.