These are both asadoras. They both feature heroines with rough childhoods who persevere and eventually find success in their respective fields. Oshin is a littler harsher than Ochoyan, but both have their heartbreaking moments.
Both dramas are asadoras and I highly recommend them. If you’ve seen one, you’ll want to see the other since they both have Sugisaki Hana, who is great in both.