230gr
The scenario where potato seeds have an advantage is where your crop fails, for any number of reasons. The tubers don't keep for more than a season. The seeds will make it possible to replant for the next season. The seeds, if properly stored, will be viable for at least two years, perhaps more.
I agree that the first crop is small and requires that the plants be freeze protected over the winter.
There is no reason one could not plant both tuber and seed. That gives you larger potatoes in the first season and insurance in case of crop loss.