The 2 pictures, set side by side, in your original post, are fascinating
@debodun !
They sure do look like they will make healthy plants.
IF you want to get actual potatoes, to eat, then you will need to "hill up" around them as they grow their straight stems, taller and taller.
You just add some dirt around them, into taller mounds, a couple of times, and then stop later on.
The new potatoes actually grow out sideways, from the lower parts of the upright stems,
(inside the added mound of surrounding dirt, you add or pull up around them)
on those type of potatoes,
while those white roots go downward, to feed the whole plant.
The "hilling up" prevents sunlight from damaging exposed potatoes, which then have green spots if sunlight exposed, and those are NOT safe to eat then.
But hilling up does not need to be fancy, and works well for eatable potatoes in Autumn!
Upright type of Potato plants make great foliage, and pretty flowers too.
Many potatoes from the grocery stores, nowadays, do not sprout much or grow as well as yours did, due to having been prepared for longer storage, from farm to sale point. (Spraying them, and other methods of temperature cooling.... and conditions, prevents them from producing plant or new potato's)
I love the vines from Sweet potatoes too. Bright colored leaves of interesting shape.