You might check with Boyd's to get the answer.You could also check the parts breakdowns for the two guns to determine which parts are the same, as in have the same part number.
The EVP's for Maximus are not posted yet, but when they are, it probably will not answer the question. The Maximus airtube will have a different part number unless it still says "Discovery" on the side. The position of trigger pack, air gauge, and stock lug may have changed. Hopefully they kept it the same. Need someone to try a disco stock on a maximus, or visa versa. Boyds maybe interested in verifying it, but will want an action sent to them.