I take that back... it was the USRA short tender that has molded in coal bunker doors. Externally, the factory tenders for the 4-6-0 and 2-8-0 (the newest "Sound value release from 2018) look nearly identical, except for the speaker ports on the underside of the 2-8-0 tender (and the different PCB inside). There are some minor differences inside the shell, but I just confirmed that the shells are interchangeable.
OTOH, if you are talking about the 2-8-0 with DCC and sound, the DCC sound board and speaker may not fit under the SP whaleback shell.