My speakers use all scanspeak drivers. It is really quite a blessing to be able to buy them off the shelf from Madisound when needed.
I’ll mention that while the main speaker ID numbers remain the same, scanspeak will sometimes add a suffix that will indicate the latest iteration of the driver.
The mid woofers I have purchased over many years have a different suffix that has changed a couple of times over the years and indicate there are slight changes in the manufacture of the woofer. As an example, the latest I purchased have a slightly larger surround than the previous. I believe all the speaker sound characteristics remain constant, I don’t notice a difference in their sound profile.