I found this on Iris so unlike the 3200 memory upgrade it does appear to be a controller swap out: -
7240 to 7240XM Upgrade
7240XM-UG is the 7240XM upgrade SKU, priced at $2995. The customer can order the upgrade SKU, get shipped the 7240XM and will have 60 days from the time the order is placed to return the old 7240 SKU. At the end of 60 days, the customer will be invoiced for the differential amount ($39,995 - $2995) and will be responsible for the invoice in 30 days