Differences Quantum of the Seas vs. Anthem of the Seas

Quantum of the Seas and Anthem if the Seas are identical sister ships. The only difference is the artwork as well of some different shops at the Royal Esplanade. 
For restaurants, public areas and staterooms there are no differences.

These pictures are:
Above from The VIA - Anthem to the left and Quantum to the right. Below shops at Royal Esplanade - again Anthem to the left and Quantum to the right.

This pictures are 'The Animals at Deck 15' - The Giraf at Anthem and the Bear at Quantum.

This is a short video with highlighting the differences: