I have scovys, and love them! the two parents and dozen young ducklings held off a great pyranees and a jack russel till my collie could be released to thrash them, pair attacked a least weasel till second best/fav barn cat could get into pen to dispatch and eat it saving eggs maybe, and daddy fought off lesser weasel till cats and dogs could drive away and dogs get out into open to tear in half.
I'm wondering how scovy compare to owning campbells and runners? health wise, mess wise, feed wise, letting free range or needing to be penned, come when you call ect, and can watch out for selves at least temp some. I originally got scovy pair to brood other types of foul, and for meat and additional eggs from the scovy.. now not sure if can sell off or eat extra drakes. so wondering how egg laying type ducks like khaki campbell/welsh harliquin (as told differnt color type of same breed), and runners, compare all around. the scovy sit on front porch in morn and then evening waiting for woman of house to come out, or along driveway waiting for her to come home from work, wagging butts furiously when she says hello to them (this is the same woman who wants to kill to eat ect my chickens and pigeons, and hates all birds). she says they are trying to tell me to "send out da fat lady or da cat gets it!", as they trap the cat and as she puts it seem to be holding him hostage till she comes and feeds them. they corner and hiss at him ect, making him cry till we open door were i then put him up on railing were safe as otherwise they chase him across yard). lol. they don't bother other four smaller cats (one cat even sleeps with tries to help herd, protects them, and even eat together), just her big useless fav baby. she yells at me not to feed them too much as the food bill is getting expensive, but i hardly feed them at all and she feeds them three four times a day at times. She says i should kill all the "danged" (close enough to word), chickens and just keep ducks mostly. she hates the roosters and threatens their lives each at least weekly with knives ect in hand, but in her defense the biggest meanest one crows right under her window. guess part of what asking as rambled was about personalities of as well?
I have buffs and call ducks but the majority are Muscovy here. One thing for comparison reasons is the fact they really are not ducks, being non mallard derived and more closely related geese i find it can be difficult to compare them across the board, they give a unique experience. Noise is likely the biggest factor, since drakes only hiss/huff and females generally use their trill, coo as a voice(they DO quack and hiss they actually have an extremely broad range of vocals) will be the most notable.
Water usage too, my buffs and calls definitely like swimming more than the scovies who like to puddle about and dabble in low laying water. Egg production, Muscovy are decent but many ducks breeds do supersede their laying capabilities, so if that is a priority they are not a top contender.
As for foraging and returning, i am not seeing differences, i don't think many mallard derived breeds fly like scovies girls can, except my calls.. the buffs i have barely seen take a flutter still unclear whether they truly can fly or not. Mallard derived breeds don't roost like Muscovy, which is well sometimes a good thing as scovies can be up on all sorts of stuff.. roofs, furniture etc.. the broody factor of a scovie is something else too, not sure how that contends with others breeds but i know they are tops for the capability which is both a positive and a negative.
I don't believe many other breeds have been actually documented for their fly eating ability like Scovies have, so that definitively from a pest control standpoint puts them in the top for breeds if pest control is on your radar, health wise they are considered quite hardy, but so are other breeds how it bangs up against each breed i have yet to see much in the form of documentation to compare.