The two are very similar in concept but quite dissimilar in sizing. I am typically a 6.5/7 (and have average-wide feet). In the Irina Pumps I sized up to a 7.5 but had to use inserts once the leather stretched out after extended wear. In the Aria pumps the 6.5 fits almost perfectly.
Pictured here is the color “sand” which is more of a “nude” without much pink undertone. (The “nude” in PLV was pictured here and it has a pinkish tint to it)