There are more than two correlations that have been made, and there are important questions that also need to be asked as to whether any astrological correlations are intrinsic to the deck.
If they are not intrinsic, then correlations that seem to be meaningful may provide a useful basis.
Another question that may also be asked is whether you (or they) are using alphabetic correlations (with the Hebrew alphabet), and, if so, of the four most common correlations, which one. This becomes also important as Hebrew letters, in Kabalistic tradition, have astrological correlations.
Of course, I would personally advocate that the deck be studied and engaged primarily without such correlations, but rather simply looking carefully at the presented imagery. It may turn out, of course, and depending on which deck one uses, that astrological correlations emerge - and if using a 20th century deck, this is very likely, as many have incorporated the artist's preferred astrological views.