I was under the impression that their earlier units had 68040 and their "rendering acceleration" improvement was simply the 68060.
That's not only the impression!! Cassablanca are 68040, if you have the accelerated rendering option MacroSystem replace the 68040 by a MC68LC060RC50.
Recently I had the opportunity to buy a stock of these MacroSystem CPU but I looked for Full 68060 CPU with the latest mask! I was surprise to discover the the Turbo rendering option was only a MC68LC060RC50 CPU