How to differentiate normal potato from the potato that has sweetness? Sometimes, we need to add potato to our dishes like in  Pulao and some Indian dry vegetable dishes. But some potatoes have sweetness to them which ruin the flavor of the dish.

Is there a way to differentiate the potatoes which are sweet in flavor from the normal one without tasting? 

Note: I am not talking about Sweet potato, which is a different thing altogether.
Though there is not a perfect way you can differentiate them except tasting, but you can try following ways which are kinda based on experience as we used to run a grocery store.

1. By smelling them

You can smell them while purchasing. If you smell some sweetness, it will have sweetness. Though, it'd require some practice.

2. By texture and color

You can differentiate between them by looking at color.

For eg., this one has sweetness.



While this one doesn't have.



There is one more, but it works after boiling.

If you boil potato with sweetness, it will get glue-ish.