Yes. Although the marble of both items will be of identical quality, both products may have been carved from a different piece of natural stone.
In that case, the basic colour (black, white, green or grey) of the marble will be the same, but the pattern or intensity of the veins may differ.
You can find the reason behind this in our article on marble.
If the marble markings are a stumbling block for you - and the item therefore does not meet your expectations - then of course you can always claim the right of withdrawal and return the product.