Having said that, your pups have some of the characteristics of purebred Golden Retrievers. Goldens do come in a light blond like that, and they can have lighter shadings and some white markings. Although these characteristics are penalized in the show ring, they can appear in any litter. For show breeders, pups with very light coats and/or white markings would be considered pet quality.
What tells me that these pups are probably mixed is the shape of their ears and heads. Here is a photo of a purebred 13-week-old Golden puppy with a light coat and lighter shadings. You can easily see the differences between this pup and your two pups.
Your pups also don't have heads that closely resemble purebred Labrador Retriever puppies either. Here's a photo of a pet-quality 13-week-old female Lab puppy. Again, you can see the differences.
Your pups are clearly a mix of either Lab or Golden and something else. The "something else" may be impossible to ever know for certain.
I hope all of this info helps.
You have beautiful dogs, btw.
we refer to that “something else” as “a short brown traveling salesman” (substitute an appropriate color as needed.)