Marianne could comment on this but the impression I get is there is far less to do with a golden's coat than a cavalier's. They also drop less hair than many short hair breeds and it's easy to vacuum.Yes a Cavalier does need more grooming, their coat grows long and can easily mat behind the ears, on the trousers, feathering, on the stomach, even the tail. It's rare for Goldens to mat even if it can happen.
Now I must say my Cavaliers have all shed very little, but the Goldens have varied. Dandy sheds a LOT LOT LOT, but obviously only twice a year. But he has a VERY long coat, the fur on his stomach basically hits the ground, and he has these really tight Shirley Temple curls all over him, masses and masses of coat, so when he sheds, you know ALL about it! This isn't the most common Golden coat.
Although it has to be said, the very WORST nightmare shedders are the Malinois and Mali crosses (they have the same coat, the crosses). Thank goodness it's only twice a year as what comes off one dog looks like it had come off about a hundred!! You wouldn't think it of a shorthaired breed, but it's the double coat, with the undercoat coming out.
Now finally just one word of caution. Generally speaking Goldens and Cavaliers are a great mix -but there ARE still size differences to take into account, and a lot will hinge on how the dogs behave. (A note on the sizes: Taking it to the very extremes, a small Cavalier can weigh as little as 6 kgs, a big Golden as much as 40 kgs. More common is perhaps 8-10 kg for the Cavalier and 25-35 for the Golden, depending on sex.) When I got Rufus, my first Cavalier, he loved playing with my existing, already adult, Goldens. In fact there is a photo on my website on the photo page of him as a pup sticking his head into a big Golden mouth to nick a tennis ball, and another where he tries to nick a ragger out of the same dog's mouth LOL. :D
But then I got a new Golden puppy when Rufus was 18 months old -Dandy. At first they loved playing together. But as Dandy grew, Rufus stayed the same size of course, and at about 6 months of age Dandy was MUCH bigger than Rufus but still a young very playful pup, and he did not understand that he could no longer play with Rufus in the same way he used to. It was too rough for Rufus, due to the size difference, and eventually Rufus refused point blank to go for walks with Dandy. He would go on his own, never again with Dandy. He was that scared of being knocked over as it happened frequently. That's when we got a second Cavalier so he had a friend his own size and since then we have always had at least 2 small dogs.
On the other hand you have dogs like Simba, my other male Golden, who just instinctively KNOWS to be gentle with smaller dogs.