I would say which is best, other than personal preference, is if you want a dog that is around you and you take for a run and kind of entertains itself?
A samoyed would be better.
Do you want a dog to do things with, take most places you go and that enjoys being more of a social butterfly and is always in the middle of all you and your family do?
Then think poodle.
We had in our dog club breeders of both breeds that competed with them in conformation and obedience, before we had agility.
We had some club members that had both breeds, some from those breeders.
The ones with samoyed had more management problems, training problems, just had more dog to manage than those with poodles, that come practically trained and being part of the human pack.
Some consider poodles, especially the bigger ones, to be humans in a dog suit.
Samoyed are all dog, with more primitive dog instincts.
The breeder of samoyed was a very competent and experienced professional dog handler and dog groomer.
Her very sweet male one day, out of the blue, jumped her when she came home.
She had to fend him off with a chair and it took over 100 stitches to put her back together.
She thinks maybe she carried some smell from a dog she groomed her dog took serious offense over?
He had never shown any aggression before or after, but that is how those dogs are.
Samoyed live more to their own drummer and follow their dog instincts over any management or training.
Just more dog to live with than poodles, that are attuned to humans in a more discerning way, we may say.
Between such two different types of dog personalities, it depends what you want of your dog experience which kind of dog will fit best in your life.