I  got off to a low club lead and declarer managed to run home with nine tricks  (1♣, 3♠, 2♥. 3♦). We lose 10 imps. 
Here we  get off to the ♣A lead, partner plays the ♣4 (UDCA), then we shift to heart.  This time, instead of winning 10 imps (4♣ plus 1♥) we lose 1 imp to  4♠ making four (they make 3nt via 5♠, 3♦ and a ♥. 

 Help
 Help
 
							  
								
