IMO, it was/is presumptuous and preposterous P. R. to even attempt equating these steps with the Spanish Steps. At the top of the Spanish Steps is the 16th Century church, Trinita dei Monti, and the associated 16th Century Villa Medici, and its associated gardens. The church, the villa, and the gardens are state property of the Republic of France.
At the bottom of the steps is the Piazza di Spagna (Spanish Square) named for the Palazzo di Spagna, which fronts on the Piazza. This Palazzo was acquired by Spain in the mid 17th Century to serve as its embassy to the Holy See (Vatican). The Palazzo continues to serve as an embassy today. In one sense, the Spanish Steps connects national property of Spain with national property of France.
These steps in the Seaport simply connect one road with another road, and there is nothing monumental or historic at either end.
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Many thanks for posting the ;ink to the interesting and informative article in On the Channel.