I have been thinking about why it would not be the visa version.
Per the Nordstrom website; "Everyone is considered for the Nordstrom retail card. Customers who make frequent purchases at Nordstrom will also be considered for the Visa card."
I have no clue what they consider a frequent customer? From this I am guessing that it does not matter what your credit limit is, that you will only get the Visa if you are a "frequent customer."