Hmmm...
See, newborn babies are pretty easy really, they’re harder because you had to get them out and they’re still on milk and so there’s all that to deal with.
But if you were talking someone else’s just weaned baby vs puppy... then it’s puppy - they don’t have nappies, they don’t stay where you put them and they bite lots, there’s no easy way of getting them to nap and no bedtime.
But obviously longterm, puppies aren’t like that for as long as babies are babies.
So...