To each man his own choice - the main thing is "how does it play ?", not whether it says Bass Clarinet, Tenor Sax, or C-mel on the box.
The first two (b-c and t-s) are often quite interchangeable, as dimensions and length of cut/machining can vary between manufacturers. When I checked out one of Steve's Aquilasax C-mel mouthpieces, I also used my tenor sax Rico Royals as well as the C-mel ones supplied.
Apart from a bit of overhang at the end of the table, the width and tip profile of the tenor Rico's seemed to match without slicing or pinching my tongue. And both the Aquilasax and Rico reeds played fine. It's mostly the length that makes modern tenor and bass-clari reeds look a bit daft on the old C-mel mouthpieces.
As long as you can get the lig far enough on (past the machined part of the reed) they all play..... Then it's just down to a personal choice of response and sound.