There is no difference; it all depends on what they are called in each region of the world. It's like saying "car" and "auto," which are the same, just different names depending on the region. However, we can discuss the difference between poisonous and non-poisonous ones.

• The non-poisonous scorpion has thick pincers, and its tail stinger is single.
• The poisonous scorpion has thinner pincers, and its stinger is double, as shown in the image.

These are quick differences to identify a poisonous scorpion from a non-poisonous one, but if you look more closely, you'll see that the non-poisonous scorpion is bulkier, with thicker parts than the poisonous one.