Yes, the generation.
It was also a means (and reaction to) the naming mess that had preceded the new naming scheme for computers using the 601, 603, & 604 processors.
Apple sold the same machines to several retail channels using different names, to allow people to say they'll price match (which couldn't be done, since you were the only ones selling that machine) and got into a bit of trouble for price fixing. 😱
But the naming problem wasn't the only problem, they were also selling several processors at different speeds -- but some clueless consumer (a heck of a lot of them) thought the fastest clock crunched numbers fastest.
Wasn't true, a pro-604e at 200 MHz (or an even slower clocked dual) was faster than the consumer-603 at 225MHz -- which sold at the same time.
So Apple fixed both the names and the MHz at the same time, to help stupid consumers better choose the right product.