A curiosity about normal maps

Hi

I am wondering if the normals that I have are correct. I have 3 barrels (2 lowpoly and 1 high poly) and I have baked the normals maps using xNormals (the green channel is not inverted in the images). The lowpoly barrels are different. One is just a cylinder and the other one has a little bit more details and I am interested about those side details (the bumps)

Here is my question :

Please check the first image. On the left we have the the normal map for the lowpoly barrel with a little bit of details and on the right we have the normals for the barrel which is just a cylinder. I want to know if the normal map on the left is correct. I am asking because its not looking very smooth like to one of the right. You can also check the other image to see how the barrels are.

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