Here's a list of duck breeds for you. I know you said Swedish or Cayuga, but I want you to be able to compare.
Breed Uses, Egg Laying Rate Weight Temperament
Cayuga Meat, Eggs (100-180/year) 6-7 lbs Calm, Quiet
Swedish Meat, Eggs (100-160/year) 5.5-7 lbs Calm, Good forager
Silver
Appleyard
Meat, Eggs (200-280/year) 7.5-9 lbs Calm, Forager, Tame, Good Mother, Beautiful
Rouen (Commercial) Meat, Eggs (100-180/year) 5.5-7 lbs Calm,  Good Mother
Runner Eggs (200-290/year) 4.5-6 lbs Active, Some are nervous, Colourful 
Welsh Harlequin Eggs (280-340/year) 4-5.5 lbs Tame, Quiet
Khaki Campbell Eggs (280-350/year) 
4-5.5
lbs
Can Be Nervous
Pekin Meat, Eggs (100-160/year) 9-12 lbs) Calm, Big, Grows Fast, Picks Clean, Tame, Talkative
Call  Pets, Eggs (100 or so/year) 500 grams Talkative, Small, Colorful
Magpie Eggs (140-250/year) 4.5-6 lbs Pretty, Calm, Good with heat, foragers
Ancona Meat, Eggs (120-190/year) 6.5-8 lbs Pretty, calm, foragers
Muscovy Meat, Broody (only 35-120 eggs/year) 8-12 lbs Tasty, Foragers, Can Fly, Excellent Mothers, Less at risk from predators (still at risk though)
Dutch Hookbill Meat, Eggs (100-160/year) 6.5-8 lbs Calm, excellent foragers, pretty
Crested Meat, Eggs (115-200/year) 5.5-7 lbs Pretty, foragers, good pets, hard to breed